Cita APA (7a ed.)

Hull, C. L. (1928). Aptitude testing. World Book Company.

Cita Chicago Style (17a ed.)

Hull, Clark Leonard. Aptitude Testing. Yonkers-on-Hudson, New York: World Book Company, 1928.

Cita MLA (9a ed.)

Hull, Clark Leonard. Aptitude Testing. World Book Company, 1928.