Sethna, B. (1984). Research methods in marketing and mgt. Tata McGraw Hill.
Lua i Stíl Chicago (17ú heag.)Sethna, B. Research Methods in Marketing and Mgt. New Delhi: Tata McGraw Hill, 1984.
Lua MLA (9ú heag.)Sethna, B. Research Methods in Marketing and Mgt. Tata McGraw Hill, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.