APA (7th ed.) Citation

Hornung, J. L., & McKenzie, A. A. (1955). Radio operating questions and answers (12th ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Hornung, Julius Lawrence, and Alexander A. McKenzie. Radio Operating Questions and Answers. 12th ed. New York: McGraw-Hill, 1955.

MLA (9th ed.) Citation

Hornung, Julius Lawrence, and Alexander A. McKenzie. Radio Operating Questions and Answers. 12th ed. McGraw-Hill, 1955.