Παραπομπή APA

Goel, B. S. (1990). Marketing research (2 Edition.).

Παραπομπή Chicago Style

Goel, B S. Marketing Research. 2 Edition. Pragati Prakashan, Meerut, 1990.

Παραπομπή MLA

Goel, B S. Marketing Research. 2 Edition. 1990.