Williams, R. S. (1998). Performance management: Perspectives on employee performance. International Thomson Business Press.
Lua i Stíl Chicago (17ú heag.)Williams, Richard S. Performance Management: Perspectives on Employee Performance. London: International Thomson Business Press, 1998.
Lua MLA (9ú heag.)Williams, Richard S. Performance Management: Perspectives on Employee Performance. International Thomson Business Press, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.