APA استشهاد

singh,Avtar. (2011). Business Law: : principles of mercantile law. Eastern Book Company.

استشهاد بنمط شيكاغو

singh,Avtar. Business Law: : Principles of Mercantile Law. Lucknow: Eastern Book Company, 2011.

MLA استشهاد

singh,Avtar. Business Law: : Principles of Mercantile Law. Eastern Book Company, 2011.