Cita APA (7a ed.)

Spearman, C. E. (1923). The nature of Intelligence and the principles of cognition. MacMillan and Co.

Cita Chicago Style (17a ed.)

Spearman, Charles Edward. The Nature of Intelligence and the Principles of Cognition. London: MacMillan and Co, 1923.

Cita MLA (9a ed.)

Spearman, Charles Edward. The Nature of Intelligence and the Principles of Cognition. MacMillan and Co, 1923.