APA (7th ed.) Citation

Helson, H. (1951). Theoretical foundations of psychology. D. Van Nostrand Company.

Chicago Style (17th ed.) Citation

Helson, Harry. Theoretical Foundations of Psychology. New York: D. Van Nostrand Company, 1951.

MLA (8th ed.) Citation

Helson, Harry. Theoretical Foundations of Psychology. D. Van Nostrand Company, 1951.

Warning: These citations may not always be 100% accurate.