Cita APA (7a ed.)

Canfield, B. R. (1956). Public relations: Principles, cases and problems. Richard D. Irwin.

Cita Chicago Style (17a ed.)

Canfield, Bertrand R. Public Relations: Principles, Cases and Problems. Homewood (Illinois): Richard D. Irwin, 1956.

Cita MLA (9a ed.)

Canfield, Bertrand R. Public Relations: Principles, Cases and Problems. Richard D. Irwin, 1956.