Cita APA (7a ed.)

Perry, J., & Perry, E. (1976). Face to face: The individual and soial problems (2, print.). Educational associates.

Cita Chicago Style (17a ed.)

Perry, John, y Erna Perry. Face to Face: The Individual and Soial Problems. 2, print. Boston: Educational associates, 1976.

Cita MLA (9a ed.)

Perry, John, y Erna Perry. Face to Face: The Individual and Soial Problems. 2, print. Educational associates, 1976.