Bard, R. (1987). The trainer's professional development handbook. Jossey - Bass.
Čikaški stil citiranja (17. izdanje)Bard, Ray. The Trainer's Professional Development Handbook. san Fransisco: Jossey - Bass, 1987.
MLA način citiranja (9. izdanje)Bard, Ray. The Trainer's Professional Development Handbook. Jossey - Bass, 1987.
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