(1990). Human Resource Management / Marc G. Singer. PWS-Kent.
Lua i Stíl Chicago (17ú heag.)Human Resource Management / Marc G. Singer. PWS-Kent, 1990.
Lua MLA (8ú heag.)Human Resource Management / Marc G. Singer. PWS-Kent, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.