एपीए उद्धरण

Avtar Singh. (1999). Law of contract (7th ed.). Eastern book company.

शिकागो स्टाइल उद्धरण

Avtar Singh. Law of Contract. 7th ed. Lucknow: Eastern book company, 1999.

एमएलए उद्धरण

Avtar Singh. Law of Contract. 7th ed. Eastern book company, 1999.