Barkley, N. (1995). The Crystal - Barkley guide to taking charge of your Career. Workman.
Lua i Stíl Chicago (17ú heag.)Barkley, Nella. The Crystal - Barkley Guide to Taking Charge of Your Career. New york: Workman, 1995.
Lua MLA (9ú heag.)Barkley, Nella. The Crystal - Barkley Guide to Taking Charge of Your Career. Workman, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.