Cita APA (7a ed.)

Canfield, B. R. (1968). Public relations: Principles, cases, and problems (5th ed.). Irwin.

Cita Chicago Style (17a ed.)

Canfield, Bertrand R. Public Relations: Principles, Cases, and Problems. 5th ed. Homewood, Ilinois: Irwin, 1968.

Cita MLA (9a ed.)

Canfield, Bertrand R. Public Relations: Principles, Cases, and Problems. 5th ed. Irwin, 1968.