Bard, R. (1987). The trainer's professional development handbook. Jossey - Bass.
Chicago Style (17. basım) AtıfBard, Ray. The Trainer's Professional Development Handbook. san Fransisco: Jossey - Bass, 1987.
MLA (9th ed.) AtıfBard, Ray. The Trainer's Professional Development Handbook. Jossey - Bass, 1987.
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