Cita APA (7a ed.)

Black, S. (2001). Practice of public relations (4th ed.). Butterworth-Heinemann.

Cita Chicago Style (17a ed.)

Black, Sam. Practice of Public Relations. 4th ed. Boston, [etc.]: Butterworth-Heinemann, 2001.

Cita MLA (9a ed.)

Black, Sam. Practice of Public Relations. 4th ed. Butterworth-Heinemann, 2001.