APA (7th ed.) Citation

Marcus, A., & Marcus, W. (1973). Elements of radio (6th ed.). National Book Store.

Chicago Style (17th ed.) Citation

Marcus, Abraham, and William Marcus. Elements of Radio. 6th ed. [Manila: National Book Store, 1973.

MLA (9th ed.) Citation

Marcus, Abraham, and William Marcus. Elements of Radio. 6th ed. National Book Store, 1973.

Warning: These citations may not always be 100% accurate.