APA (7th ed.) Zitazioa
Henry, H. B. (1999). Cameroon on a clear day. William Carey Library.
Chicago Style (17th ed.) Zitazioa
Henry, Helga Bender. Cameroon on a Clear Day. California: William Carey Library, 1999.
MLA (9th ed.) Zitazioa
Henry, Helga Bender. Cameroon on a Clear Day. William Carey Library, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.