APA (7th ed.) Zitazioa
Singh, S. Principles of Mechanical Engineering. S.Chand & Company ltd.
Chicago Style (17th ed.) Zitazioa
Singh, Sadhu. Principles of Mechanical Engineering. New Delhi: S.Chand & Company ltd.
MLA (9th ed.) Zitazioa
Singh, Sadhu. Principles of Mechanical Engineering. S.Chand & Company ltd.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.