Barkley, N. (1995). The Crystal - Barkley guide to taking charge of your Career. Workman.
Chicago-referens (17:e uppl.)Barkley, Nella. The Crystal - Barkley Guide to Taking Charge of Your Career. New york: Workman, 1995.
MLA-referens (9:e uppl.)Barkley, Nella. The Crystal - Barkley Guide to Taking Charge of Your Career. Workman, 1995.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.