Cofnodi Dyfyniadau
Dyfyniad APA
Kleppner, O., Russell, T., & Verrill, G. (1986). Advertising procedure (9th ed.). Prentice Hall.
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Dyfyniad Arddull Chicago
Kleppner, Otto, Thomas Russell, and Glenn Verrill. Advertising Procedure. 9th ed. Englewood: Prentice Hall, 1986.
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Dyfyniad MLA
Kleppner, Otto, et al. Advertising Procedure. 9th ed. Prentice Hall, 1986.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.