Cita APA

Wallas, G. 1., & Wallas, G. 1. (1926). The art of thought. New York, New York: Harcourt Brace.

Citación estilo Chicago

Wallas, Graham 1858-1932, y Graham 1858-1932 Wallas. The Art of Thought. New York, New York: Harcourt Brace, 1926.

Cita MLA

Wallas, Graham 1858-1932, y Graham 1858-1932 Wallas. The Art of Thought. New York, New York: Harcourt Brace, 1926.