एपीए उद्धरण

Crawford. (1981). Plastic engineering (2nd ed.). Pergaman Press.

शिकागो स्टाइल उद्धरण

Crawford. Plastic Engineering. 2nd ed. NeewYork: Pergaman Press, 1981.

एमएलए उद्धरण

Crawford. Plastic Engineering. 2nd ed. Pergaman Press, 1981.