Maitra, B. (1962). A basic study of commercial geography. Suneja Book Centre.
Lua i Stíl Chicago (17ú heag.)Maitra, Biswanath. A Basic Study of Commercial Geography. New Delhi: Suneja Book Centre, 1962.
Lua MLA (8ú heag.)Maitra, Biswanath. A Basic Study of Commercial Geography. Suneja Book Centre, 1962.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.