Cita APA (7th ed.)

Silberman, M. (1992). Twenty active training programs. Pfeiffer.

Cita Chicago (17th ed.)

Silberman, Mel. Twenty Active Training Programs. Johannesburg: Pfeiffer, 1992.

Cita MLA (8th ed.)

Silberman, Mel. Twenty Active Training Programs. Pfeiffer, 1992.