Dyfyniad APA
McDonald, W. J. (1998). Direct marketing: An integrated approach. Irwin/McGraw-Hill.
Dyfyniad Arddull Chicago
McDonald, William J. Direct Marketing: An Integrated Approach. Boston: Irwin/McGraw-Hill, 1998.
Dyfyniad MLA
McDonald, William J. Direct Marketing: An Integrated Approach. Irwin/McGraw-Hill, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.