APA (7th ed.) Zitazioa
Tippett, A. R. (1970). People of southern Ethiopia. William Carey Library.
Chicago Style (17th ed.) Zitazioa
Tippett, Alan R. People of Southern Ethiopia. South pasadena, Calif.: William Carey Library, 1970.
MLA (9th ed.) Zitazioa
Tippett, Alan R. People of Southern Ethiopia. William Carey Library, 1970.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.