APA
Beri G. C., . (1989). Marketing Research. New Delhi: Tata McGraw Hill.
Chicago
Beri G C, . 1989. Marketing Research. New Delhi: Tata McGraw Hill.
Harvard
Beri G. C., . (1989). Marketing Research. New Delhi: Tata McGraw Hill.
MLA
Beri G C, . Marketing Research. New Delhi: Tata McGraw Hill. 1989.