APA Citation

Helson, H. (1951). Theoretical foundations of psychology. New York, New York: Van Nostrand.

Chicago Style Citation

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

MLA Citation

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

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