Avtar Singh. (1980). Law of contract (3rd ed.). Eastern book company.
Chicago Style aipamenaAvtar Singh. Law of Contract. 3rd ed. Lucknow: Eastern book company, 1980.
MLA aipamenaAvtar Singh. Law of Contract. 3rd ed. Eastern book company, 1980.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.