APA (7th ed.) Citation

Canfield, B. R. (1973). Public relations: Principles cases and problems (6th ed.). Richard D. Irwin, Inc..

Chicago Style (17th ed.) Citation

Canfield, Bertrand R. Public Relations: Principles Cases and Problems. 6th ed. Illinois: Richard D. Irwin, Inc., 1973.

MLA (9th ed.) Citation

Canfield, Bertrand R. Public Relations: Principles Cases and Problems. 6th ed. Richard D. Irwin, Inc., 1973.