Dyfyniad APA

Beri, G. (2005). Marketing Research. Tata Mc Graw -Hill Publishing Company Limited.

Dyfyniad Arddull Chicago

Beri, G.C. Marketing Research. New Delhi: Tata Mc Graw -Hill Publishing Company Limited, 2005.

Dyfyniad MLA

Beri, G.C. Marketing Research. Tata Mc Graw -Hill Publishing Company Limited, 2005.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.