APA সাইটেশন

Avtar Singh. (1999). Introduction to the law of contract (3rd ed.). Eastern book company.

শিকাগো স্টাইলে সাইটেশন

Avtar Singh. Introduction to the Law of Contract. 3rd ed. Lucknow: Eastern book company, 1999.

এমএলএ সাইটেশন

Avtar Singh. Introduction to the Law of Contract. 3rd ed. Eastern book company, 1999.