Bard, R. (1987). The Trainer's professional development handbook. Jossey-Bass.
Citazione stile Chigago Style (17a edizione)Bard, Ray. The Trainer's Professional Development Handbook. San Francisco, California: Jossey-Bass, 1987.
Citatione MLA (9a ed.)Bard, Ray. The Trainer's Professional Development Handbook. Jossey-Bass, 1987.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.