Singh, A. (2018). Business Law (11th.). Eastern Book Company.
Lua i Stíl Chicago (17ú heag.)Singh, Avtar. Business Law. 11th. Lucknow: Eastern Book Company, 2018.
Lua MLA (9ú heag.)Singh, Avtar. Business Law. 11th. Eastern Book Company, 2018.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.