UFO (Indonesian Wikipedia)

Ruppelt 2006, hlm. 5. Ruppelt, Edward (2006). The Report on Unidentified Flying Objects (Edisi 2). Norfolk: The Blue Book Archive. {{cite book}}: |ref=harv tidak validPemeliharaan CS1: Status URL (link)
Ruppelt 2006, hlm. 6. Ruppelt, Edward (2006). The Report on Unidentified Flying Objects (Edisi 2). Norfolk: The Blue Book Archive. {{cite book}}: |ref=harv tidak validPemeliharaan CS1: Status URL (link)
Ruppelt 2006, hlm. 1. Ruppelt, Edward (2006). The Report on Unidentified Flying Objects (Edisi 2). Norfolk: The Blue Book Archive. {{cite book}}: |ref=harv tidak validPemeliharaan CS1: Status URL (link)
Kripal, Jeffrey (2011-09-16). Authors of the Impossible: The Paranormal and the Sacred (dalam bahasa Inggris). University of Chicago Press. ISBN 978-0-226-45389-7.{{cite book}}: Pemeliharaan CS1: Status URL (link)

intelligence.gov (Global: low place; Indonesian: low place)

"Unidentified Aerial Phenomena. Preliminary Intelligence Assessment". www.intelligence.gov. Office of the Director of National Intelligence. Diakses tanggal 22 Maret 2025.{{cite web}}: Pemeliharaan CS1: Tanggal diterjemahkan otomatis (link)

kemdikbud.go.id (Global: 1,424^th place; Indonesian: 14^th place)

kbbi.kemdikbud.go.id

Kementrian Pendidikan dan Kebudayaan, Definisi "UFO" (Edisi V), Kamus Besar Bahasa Indonesia
"Arti kata UFO". Badan Pengembangan dan Pembinaan Bahasa, Kemendikbud. KBBI Daring. Diakses tanggal 4 Desember 2020.

michaelsheiser.com (Global: low place; Indonesian: low place)

UFO Abduction Reports: The Supernatural Kidnap Narrative Returns in Technological Guise

nasa.gov (Global: 12^th place; Indonesian: 27^th place)

science.nasa.gov

"UAP FAQs – NASA Unidentified Anomalous Phenomena Study Frequently Asked Questions". NASA (dalam bahasa Inggris). Oktober 21, 2022. Diakses tanggal Januari 30, 2024.{{cite web}}: Pemeliharaan CS1: Tanggal diterjemahkan otomatis (link)

nytimes.com (Global: 7^th place; Indonesian: 20^th place)

timesmachine.nytimes.com

"Navy Officer Sees Meteor" (PDF). The New York Times. 9 Maret 1904.

projectbluebook.org (Global: low place; Indonesian: low place)

"Project Blue Book.org – 1". Diarsipkan dari asli tanggal 2007-09-27. Diakses tanggal 2007-07-01. {{cite web}}:
"Project Blue Book.org – 2". Diarsipkan dari asli tanggal 2007-09-27. Diakses tanggal 2007-07-01. {{cite web}}:

roswellproof.com (Global: low place; Indonesian: low place)

Roswellproff.com There have been allegations of supression of UFO related evidence

time.com (Global: 84^th place; Indonesian: 102^nd place)

content.time.com

"A Brief History of UFOs". TIME (dalam bahasa American English). 2009-12-17. ISSN 0040-781X. Diakses tanggal 2021-02-21.

time.com

"Salinan arsip". Diarsipkan dari asli tanggal 2009-05-25. Diakses tanggal 2008-03-02. {{cite web}}:

tufts.edu (Global: 192^nd place; Indonesian: 190^th place)

perseus.tufts.edu

"The History of Rome, Book 21; Chapter 62". Perseus Digital Library. Diakses tanggal 2021-02-21.
"Lucullus, Chapter 8; Section 6". Perseus Digital Library. Diakses tanggal 2021-02-21.

ufoarea.com (Global: low place; Indonesian: low place)

UFO Area.com Diarsipkan 2006-12-03 di Wayback Machine. (Jacques Vallee, Passport to Magonia On Ufos, Folklore, and Parallel Worlds)

ufocasebook.com (Global: low place; Indonesian: low place)

UFO case Book.com – Hoax from Gulfbreeze

web.archive.org (Global: 1^st place; Indonesian: 1^st place)

"50 U.S. Code § 3373 – Establishment of All-domain Anomaly Resolution Office". law.cornell.edu (dalam bahasa Inggris). LII / Legal Information Institute. Diarsipkan dari versi aslinya tanggal Mei 20, 2024. Diakses tanggal 2024-03-21.{{cite web}}: Pemeliharaan CS1: Tanggal diterjemahkan otomatis (link)
"西尾市岩瀬文庫コレクション". www.city.nishio.aichi.jp. Diarsipkan dari asli tanggal 2012-06-27. Diakses tanggal 2021-02-21.
UFO Area.com Diarsipkan 2006-12-03 di Wayback Machine. (Jacques Vallee, Passport to Magonia On Ufos, Folklore, and Parallel Worlds)
"Salinan arsip". Diarsipkan dari asli tanggal 2009-05-25. Diakses tanggal 2008-03-02. {{cite web}}:
"Salinan arsip". Diarsipkan dari asli tanggal 2006-08-31. Diakses tanggal 2008-03-02. {{cite web}}:
"Project Blue Book.org – 1". Diarsipkan dari asli tanggal 2007-09-27. Diakses tanggal 2007-07-01. {{cite web}}:
"Project Blue Book.org – 2". Diarsipkan dari asli tanggal 2007-09-27. Diakses tanggal 2007-07-01. {{cite web}}:

worldcat.org (Global: 4^th place; Indonesian: 5^th place)

search.worldcat.org

"A Brief History of UFOs". TIME (dalam bahasa American English). 2009-12-17. ISSN 0040-781X. Diakses tanggal 2021-02-21.

youtube.com (Global: 13^th place; Indonesian: 18^th place)

What is the origin of the term 'UFO'?. Oxford Languages. Oxford University Press. 2 Juli 2015 – via YouTube.{{cite AV media}}: Pemeliharaan CS1: Tanggal diterjemahkan otomatis (link)

UFO (Indonesian Wikipedia)

8k.com (Global: low place; Indonesian: low place)

brumac.8k.com

baylor.edu (Global: low place; Indonesian: 5,704th place)

betaufo.org (Global: low place; Indonesian: low place)

cia.gov (Global: 133rd place; Indonesian: 94th place)

city.nishio.aichi.jp (Global: low place; Indonesian: low place)

cornell.edu (Global: 308th place; Indonesian: 198th place)

law.cornell.edu

dabsol.co.uk (Global: low place; Indonesian: low place)

nicap.dabsol.co.uk

google.co.id (Global: 2,404th place; Indonesian: 25th place)

books.google.co.id

intelligence.gov (Global: low place; Indonesian: low place)

kemdikbud.go.id (Global: 1,424th place; Indonesian: 14th place)

kbbi.kemdikbud.go.id

michaelsheiser.com (Global: low place; Indonesian: low place)

nasa.gov (Global: 12th place; Indonesian: 27th place)

science.nasa.gov

nytimes.com (Global: 7th place; Indonesian: 20th place)

timesmachine.nytimes.com

projectbluebook.org (Global: low place; Indonesian: low place)

roswellproof.com (Global: low place; Indonesian: low place)

time.com (Global: 84th place; Indonesian: 102nd place)

content.time.com

time.com

tufts.edu (Global: 192nd place; Indonesian: 190th place)

perseus.tufts.edu

ufoarea.com (Global: low place; Indonesian: low place)

ufocasebook.com (Global: low place; Indonesian: low place)

web.archive.org (Global: 1st place; Indonesian: 1st place)

worldcat.org (Global: 4th place; Indonesian: 5th place)

search.worldcat.org

youtube.com (Global: 13th place; Indonesian: 18th place)

baylor.edu (Global: low place; Indonesian: 5,704^th place)

cia.gov (Global: 133^rd place; Indonesian: 94^th place)

cornell.edu (Global: 308^th place; Indonesian: 198^th place)

google.co.id (Global: 2,404^th place; Indonesian: 25^th place)

kemdikbud.go.id (Global: 1,424^th place; Indonesian: 14^th place)

nasa.gov (Global: 12^th place; Indonesian: 27^th place)

nytimes.com (Global: 7^th place; Indonesian: 20^th place)

time.com (Global: 84^th place; Indonesian: 102^nd place)

tufts.edu (Global: 192^nd place; Indonesian: 190^th place)

web.archive.org (Global: 1^st place; Indonesian: 1^st place)

worldcat.org (Global: 4^th place; Indonesian: 5^th place)

youtube.com (Global: 13^th place; Indonesian: 18^th place)