Dyfyniad APA

Gopalakrishnana, P. (1990). Purchasing and materials management.

Dyfyniad Arddull Chicago

Gopalakrishnana, P. Purchasing and Materials Management. New Delhi, 1990.

Dyfyniad MLA

Gopalakrishnana, P. Purchasing and Materials Management. 1990.

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