APA استشهاد

Avtar Singh. (1994). Law of contract (6th ed.). Eastern book company.

استشهاد بنمط شيكاغو

Avtar Singh. Law of Contract. 6th ed. Lucknow: Eastern book company, 1994.

MLA استشهاد

Avtar Singh. Law of Contract. 6th ed. Eastern book company, 1994.