Cita APA (7th ed.)

Singh , A. (1989). Law of contract (5.). Eastern Book company.

Cita Chicago (17th ed.)

Singh , Avtar. Law of Contract. 5. Lucknow: Eastern Book company, 1989.

Cita MLA (9th ed.)

Singh , Avtar. Law of Contract. 5. Eastern Book company, 1989.