Zodiac P.I. (English Wikipedia)

"Tokyopop Announces 2003 Titles". Anime News Network. January 28, 2003. Retrieved May 19, 2014.
Divers, Allen (September 30, 2003). "Tokyo Terror – The Blast From Texas". Tankoubon Tower. Anime News Network. Retrieved May 20, 2014.

archive.org

Ando, Natsumi (2003). Zodiac P.I.. Vol. 3. Los Angeles, California: Tokyopop. p. 39. ISBN 978-1-59182-385-8. OCLC 53958674.

kodansha.co.jp

kc.kodansha.co.jp

十二宮でつかまえて（１） (in Japanese). Kodansha. Archived from the original on February 11, 2009. Retrieved May 20, 2014.
十二宮でつかまえて（4） (in Japanese). Kodansha. Archived from the original on September 2, 2015. Retrieved September 2, 2015.

mania.com

Dexter, Joseph (March 23, 2010). "10 Greatest Anime Detectives". Mania Entertainment. Archived from the original on October 13, 2013. Retrieved May 20, 2014.

nakayosi-net.com

なかよし. Nakayoshi (in Japanese). Kodansha. Archived from the original on December 1, 2002. Retrieved May 19, 2014.

playmediacompany.it

"Zodiac Detective 4" (in Italian). Play Media Company. Archived from the original on October 26, 2007. Retrieved February 13, 2015.

randomhouse.de

"Natsumi Ando: Zodiac Private Investigator" (in German). Heyne Manga. Archived from the original on March 4, 2008. Retrieved December 12, 2013.

sangatsumanga.fi

"Horoskooppimysteerit" (in Finnish). Sangatsu Manga. Retrieved November 30, 2009.

tokyopop.com

"Zodiac P.I. Volume 1". Tokyopop. Archived from the original on June 17, 2003. Retrieved May 19, 2014.
"Zodiac P.I. Volume 4". Tokyopop. Archived from the original on August 17, 2003. Retrieved May 19, 2014.
"TOKYOPOP Inc. Out of Print Titles". Tokyopop. Archived from the original on November 14, 2010. Retrieved May 19, 2014.
"Zodiac P.I. Volume 2". Tokyopop. Archived from the original on June 17, 2003. Retrieved May 19, 2014.
"Zodiac P.I. Volume 3". Tokyopop. Archived from the original on August 17, 2003. Retrieved May 19, 2014.

web.archive.org

Dexter, Joseph (March 23, 2010). "10 Greatest Anime Detectives". Mania Entertainment. Archived from the original on October 13, 2013. Retrieved May 20, 2014.
なかよし. Nakayoshi (in Japanese). Kodansha. Archived from the original on December 1, 2002. Retrieved May 19, 2014.
十二宮でつかまえて（１） (in Japanese). Kodansha. Archived from the original on February 11, 2009. Retrieved May 20, 2014.
十二宮でつかまえて（4） (in Japanese). Kodansha. Archived from the original on September 2, 2015. Retrieved September 2, 2015.
"Zodiac P.I. Volume 1". Tokyopop. Archived from the original on June 17, 2003. Retrieved May 19, 2014.
"Zodiac P.I. Volume 4". Tokyopop. Archived from the original on August 17, 2003. Retrieved May 19, 2014.
"TOKYOPOP Inc. Out of Print Titles". Tokyopop. Archived from the original on November 14, 2010. Retrieved May 19, 2014.
"Natsumi Ando: Zodiac Private Investigator" (in German). Heyne Manga. Archived from the original on March 4, 2008. Retrieved December 12, 2013.
"Zodiac Detective 4" (in Italian). Play Media Company. Archived from the original on October 26, 2007. Retrieved February 13, 2015.
"Zodiac P.I. Volume 2". Tokyopop. Archived from the original on June 17, 2003. Retrieved May 19, 2014.
"Zodiac P.I. Volume 3". Tokyopop. Archived from the original on August 17, 2003. Retrieved May 19, 2014.

worldcat.org

Ando, Natsumi (2003). Zodiac P.I. Vol. 4. Los Angeles, California: Tokyopop. p. 70. ISBN 978-1-59182-412-1. OCLC 224790991.
Ando, Natsumi (2003). Zodiac P.I. Vol. 1. Los Angeles, California: Tokyopop. p. 59. ISBN 978-1-59182-383-4. OCLC 53072126.
Ando, Natsumi (2003). Zodiac P.I. Vol. 1. Los Angeles, California: Tokyopop. p. 93. ISBN 978-1-59182-383-4. OCLC 53072126.
Ando, Natsumi (2003). Zodiac P.I. Vol. 2. Los Angeles, California: Tokyopop. p. 146. ISBN 978-1-59182-384-1. OCLC 53313006.
Ando, Natsumi (2003). Zodiac P.I. Vol. 1. Los Angeles, California: Tokyopop. p. 113. ISBN 978-1-59182-383-4. OCLC 53072126.
Ando, Natsumi (2003). Zodiac P.I. Vol. 2. Los Angeles, California: Tokyopop. p. 76. ISBN 978-1-59182-384-1. OCLC 53313006.
Ando, Natsumi (2003). Zodiac P.I. Vol. 2. Los Angeles, California: Tokyopop. p. 115. ISBN 978-1-59182-384-1. OCLC 53313006.
Ando, Natsumi (2003). Zodiac P.I.. Vol. 3. Los Angeles, California: Tokyopop. p. 39. ISBN 978-1-59182-385-8. OCLC 53958674.
Ando, Natsumi (2003). Zodiac P.I. Vol. 4. Los Angeles, California: Tokyopop. p. 9. ISBN 978-1-59182-412-1. OCLC 224790991.
Ando, Natsumi (2003). Zodiac P.I. Vol. 4. Los Angeles, California: Tokyopop. p. 73. ISBN 978-1-59182-412-1. OCLC 224790991.
Ando, Natsumi (2003). Zodiac P.I. Vol. 1. Los Angeles, California: Tokyopop. p. 148. ISBN 978-1-59182-383-4. OCLC 53072126.
Ando, Natsumi (2003). Zodiac P.I. Vol. 2. Los Angeles, California: Tokyopop. p. 39. ISBN 978-1-59182-384-1. OCLC 53313006.
Ando, Natsumi (2003). Zodiac P.I. Vol. 1. Los Angeles, California: Tokyopop. p. 169. ISBN 978-1-59182-383-4. OCLC 53072126.
Thompson, Jason (2007). Manga: The Complete Guide. New York: Del Ray Books. p. 409. ISBN 978-0-345-48590-8. OCLC 85833345.