APA استشهاد

Trotsky, L. (1967). The History of the Russian Revolution. Sphere books.

استشهاد بنمط شيكاغو

Trotsky, Leon. The History of the Russian Revolution. London: Sphere books, 1967.

MLA استشهاد

Trotsky, Leon. The History of the Russian Revolution. Sphere books, 1967.