Citazione Stile APA (7a Edizione)

Ferris, B., & Toyne, P. (1979). World problems (1. publ., revised and reprinted.). Hulton.

Citazione stile Chigago Style (17a edizione)

Ferris, Brian, e Peter Toyne. World Problems. 1. publ., revised and reprinted. London: Hulton, 1979.

Citatione MLA (9a ed.)

Ferris, Brian, e Peter Toyne. World Problems. 1. publ., revised and reprinted. Hulton, 1979.