Cita APA (7th ed.)

Canfield, B. R. (1964). Public relations: Principles, cases and problems (4th ed.). Irwin.

Cita Chicago (17th ed.)

Canfield, Bertrand R. Public Relations: Principles, Cases and Problems. 4th ed. Homewood, Ill: Irwin, 1964.

Cita MLA (9th ed.)

Canfield, Bertrand R. Public Relations: Principles, Cases and Problems. 4th ed. Irwin, 1964.