Citazione Stile APA (7a Edizione)

Speed, P., & Speed, M. (1987). The Twentieth Century World (1. publ., reprinted.). Oxford Univ. Press.

Citazione stile Chigago Style (17a edizione)

Speed, Peter, e Mary Speed. The Twentieth Century World. 1. publ., reprinted. Oxford: Oxford Univ. Press, 1987.

Citatione MLA (9a ed.)

Speed, Peter, e Mary Speed. The Twentieth Century World. 1. publ., reprinted. Oxford Univ. Press, 1987.