APA (7th ed.) Citation

Blumenthal, L. R. (1972). The practice of public relations. Macmillan.

Chicago Style (17th ed.) Citation

Blumenthal, L. Roy. The Practice of Public Relations. New York: Macmillan, 1972.

MLA (9th ed.) Citation

Blumenthal, L. Roy. The Practice of Public Relations. Macmillan, 1972.