Gray, C. F. (2003). Project management (ada CD). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Gray, Clifford F. Project Management (ada CD). McGraw-Hill, 2003.
Lua MLA (8ú heag.)Gray, Clifford F. Project Management (ada CD). McGraw-Hill, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.