Cita APA (7th ed.)

Whitworth, W. A. (1959). Choice and chance: With one thousand exercises (5a. ed.). Hafner.

Cita Chicago (17th ed.)

Whitworth, William Allen. Choice and Chance: With One Thousand Exercises. 5a. ed. Nueva York: Hafner, 1959.

Cita MLA (9th ed.)

Whitworth, William Allen. Choice and Chance: With One Thousand Exercises. 5a. ed. Hafner, 1959.