Cita APA (7a ed.)

Helson, H. (1964). Adaptation-Level Theory: An experimental and systematic approach to Behavior. Harper and Row.

Cita Chicago Style (17a ed.)

Helson, Harry. Adaptation-Level Theory: An Experimental and Systematic Approach to Behavior. New York...: Harper and Row, 1964.

Cita MLA (9a ed.)

Helson, Harry. Adaptation-Level Theory: An Experimental and Systematic Approach to Behavior. Harper and Row, 1964.