Cita APA (7a ed.)

Wren, H. A. (1942). Vocational aspiration levels of adults. Columbia University.

Cita Chicago Style (17a ed.)

Wren, Harold Aloysius. Vocational Aspiration Levels of Adults. New York: Columbia University, 1942.

Cita MLA (9a ed.)

Wren, Harold Aloysius. Vocational Aspiration Levels of Adults. Columbia University, 1942.