BITTEL R R. (1978). ENCYLOPEDIA OF PROFESSIONAL MANAGEMENT VOL-I. GROLIER INCORPORATION BUSINESS LIBERARY MC.GRAW H.
Chicago-čujuhus (17. p.)BITTEL R R. ENCYLOPEDIA OF PROFESSIONAL MANAGEMENT VOL-I. DANBURY CONNECTICUT: GROLIER INCORPORATION BUSINESS LIBERARY MC.GRAW H, 1978.
MLA-čujuhus (9. p.)BITTEL R R. ENCYLOPEDIA OF PROFESSIONAL MANAGEMENT VOL-I. GROLIER INCORPORATION BUSINESS LIBERARY MC.GRAW H, 1978.
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