Cita APA (7th ed.)

Spearman, C. (1973). The nature of 'intelligence' and the principles of cognition. Arno.

Cita Chicago (17th ed.)

Spearman, Charles. The Nature of 'Intelligence' and the Principles of Cognition. New York: Arno, 1973.

Cita MLA (9th ed.)

Spearman, Charles. The Nature of 'Intelligence' and the Principles of Cognition. Arno, 1973.