Barkley, N. (1995). The Crystal - Barkley guide to taking charge of your Career. Workman.
Chicago-čujuhus (17. p.)Barkley, Nella. The Crystal - Barkley Guide to Taking Charge of Your Career. New york: Workman, 1995.
MLA-čujuhus (9. p.)Barkley, Nella. The Crystal - Barkley Guide to Taking Charge of Your Career. Workman, 1995.
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