4 (Foreigner album) (English Wikipedia)

"Le Détail des Albums de chaque Artiste – F". Infodisc.fr (in French). Archived from the original on 22 October 2014. Retrieved 9 June 2012. Select Foreigner from the menu, then press OK.
"French album certifications – Foreigner – 4" (in French). InfoDisc. Select FOREIGNER and click OK.

loudersound.com

Jeffries, Neil (July 2, 2016). "The Strange And True Story of Foreigner 4". Classic Rock. Louder Sound. Retrieved 2022-06-17.
"Foreigner - Foreigner 4: Album Of The Week Club Review". Classic Rock. Louder Sound. October 9, 2018. Retrieved 2022-06-17.
Dome, Malcolm (17 June 2016). "The Top 10 Most Underrated Foreigner Songs". Classic Rock. Louder Sound. Retrieved 2022-06-17.
"Mick Jones' 11 Favourite Foreigner Songs". Classic Rock. Louder Sound. April 26, 2017. Retrieved 2022-06-17.

Eric Minton (September 19, 1981). "Rick Wills of Foreigner is happy to be a juke box hero". The Sun. p. 18. Retrieved 2022-06-18 – via newspapers.com.

"Offiziellecharts.de – Foreigner – 4" (in German). GfK Entertainment Charts. Retrieved 3 April 2022.
"Top 100 Album-Jahrescharts" (in German). GfK Entertainment Charts. 1981. Archived from the original on 19 October 2021. Retrieved 3 April 2022.
"Top 100 Album-Jahrescharts" (in German). GfK Entertainment Charts. 1982. Archived from the original on 19 October 2021. Retrieved 3 April 2022.

Sawday, Evan (November 26, 2014). "Foreigner: The Complete Atlantic Studio Albums 1977-1991". PopMatters. Retrieved 2023-02-05.

Stone, Mee-Lai (26 November 2014). "Hipgnosis' mind-bending album art – in pictures". The Guardian.

Wardlaw, Matt (May 2, 2015). "Top 10 Foreigner Songs". Ultimate Classic Rock. Retrieved 2022-01-08.
Rivadavia, Eduardo (May 2, 2013). "Top 10 Underrated Foreigner Songs". Ultimate Classic Rock. Retrieved 2022-01-08.

"Anecdotes, "Curio Corner" - Foreigner - Silent Partners". Archived from the original on 2012-02-26. Retrieved 2009-08-13.
Audio Revolution review Archived 2016-03-04 at the Wayback Machine of Foreigner’s 4 DVD-Audio.
Warner Premium Sound 14 September releases Archived August 13, 2011, at the Wayback Machine (in Japanese). Retrieved 2011-11-03.
"Le Détail des Albums de chaque Artiste – F". Infodisc.fr (in French). Archived from the original on 22 October 2014. Retrieved 9 June 2012. Select Foreigner from the menu, then press OK.
"Top 100 Album-Jahrescharts" (in German). GfK Entertainment Charts. 1981. Archived from the original on 19 October 2021. Retrieved 3 April 2022.
"Top 100 Album-Jahrescharts" (in German). GfK Entertainment Charts. 1982. Archived from the original on 19 October 2021. Retrieved 3 April 2022.

"Foreigner Is No Stranger Down Under" (PDF). Cashbox. September 3, 1983. p. 17. Retrieved August 30, 2024.
"Ertegun Offers Optimism at WEA Europe Meeting" (PDF). Billboard. September 11, 1982. p. 49. Retrieved August 30, 2024.
"Foreigner "4." A Worldwide Success" (PDF). Billboard. June 8, 1982. p. 39. Retrieved August 30, 2024.