Gopalakrishnan. (1982). Materials management. Prentice Hall of India.
Chicago Style aipamenaGopalakrishnan. Materials Management. New Delhi: Prentice Hall of India, 1982.
MLA aipamenaGopalakrishnan. Materials Management. Prentice Hall of India, 1982.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.