Dyfyniad APA

Simon, R. (1980). Public Relations: Concepts and Practices (2nd ed.). Grid.

Dyfyniad Arddull Chicago

Simon, Raymond. Public Relations: Concepts and Practices. 2nd ed. Columbus: Grid, 1980.

Dyfyniad MLA

Simon, Raymond. Public Relations: Concepts and Practices. 2nd ed. Grid, 1980.

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