APA (7th ed.) Zitazioa

Thomas, S. (1980). The developed world. Bell & Hymn.

Chicago Style (17th ed.) Zitazioa

Thomas, Spencer. The Developed World. London: Bell & Hymn, 1980.

MLA (9th ed.) Zitazioa

Thomas, Spencer. The Developed World. Bell & Hymn, 1980.