APA aipamena

Helmstadter, G. C. (1966). Principles of psychological measurement. Methuen.

Chicago Style aipamena

Helmstadter, G. C. Principles of Psychological Measurement. London: Methuen, 1966.

MLA aipamena

Helmstadter, G. C. Principles of Psychological Measurement. Methuen, 1966.