Cita APA (7th ed.)

Bard, R. (1987). The trainer's professional development handbook. Jossey - Bass.

Cita Chicago (17th ed.)

Bard, Ray. The Trainer's Professional Development Handbook. san Fransisco: Jossey - Bass, 1987.

Cita MLA (9th ed.)

Bard, Ray. The Trainer's Professional Development Handbook. Jossey - Bass, 1987.