Cita APA (7a ed.)

Ryan, T. A., & Smith, P. C. (1954). Principles of industrial psychology. Ronald.

Cita Chicago Style (17a ed.)

Ryan, Thomas A., y Patricia Cain Smith. Principles of Industrial Psychology. New York: Ronald, 1954.

Cita MLA (9a ed.)

Ryan, Thomas A., y Patricia Cain Smith. Principles of Industrial Psychology. Ronald, 1954.