Black, S. (1976). Practical public relations (4th.). Pitman.
Chicago Style (17th ed.) CitationBlack, Sam. Practical Public Relations. 4th. London: Pitman, 1976.
MLA (9th ed.) CitationBlack, Sam. Practical Public Relations. 4th. Pitman, 1976.
Warning: These citations may not always be 100% accurate.