Gopalakrishnan , P. (1993). Textbook of project management. Macmillan.
Lua i Stíl Chicago (17ú heag.)Gopalakrishnan , P. Textbook of Project Management. New delhi: Macmillan, 1993.
Lua MLA (9ú heag.)Gopalakrishnan , P. Textbook of Project Management. Macmillan, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.