एपीए उद्धरण

Sadhu Singh. (2006). Theory of machines (2nd ed.). Pearson Education.

शिकागो स्टाइल उद्धरण

Sadhu Singh. Theory of Machines. 2nd ed. Delhi: Pearson Education, 2006.

एमएलए उद्धरण

Sadhu Singh. Theory of Machines. 2nd ed. Pearson Education, 2006.