Dyfyniad APA

Donald Cooper. (2019). Business Reserarch Methods (12th ed.). McGraw Hill.

Dyfyniad Arddull Chicago

Donald Cooper. Business Reserarch Methods. 12th ed. Delhi: McGraw Hill, 2019.

Dyfyniad MLA

Donald Cooper. Business Reserarch Methods. 12th ed. McGraw Hill, 2019.

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