Maddux, R. (2004). Effective Performance Appraisals (4th ed.). Viva.
Lua i Stíl Chicago (17ú heag.)Maddux, Robert. Effective Performance Appraisals. 4th ed. New Delhi: Viva, 2004.
Lua MLA (9ú heag.)Maddux, Robert. Effective Performance Appraisals. 4th ed. Viva, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.