Cita APA (7a ed.)

Powers, E., & Witmer, H. L. (1951). An experiment in the prevention of delinquency: The Cambridge-Somerville Youth-study. Columbia Univ. Pr.

Cita Chicago Style (17a ed.)

Powers, Edwin, y Helen L. Witmer. An Experiment in the Prevention of Delinquency: The Cambridge-Somerville Youth-study. New York: Columbia Univ. Pr, 1951.

Cita MLA (8a ed.)

Powers, Edwin, y Helen L. Witmer. An Experiment in the Prevention of Delinquency: The Cambridge-Somerville Youth-study. Columbia Univ. Pr, 1951.