Cita APA (7a ed.)

Helson, H. (1964). Adaptation-level theory: An experimental and systematic approach to behavior. Harper & Row.

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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