APA (7th ed.) Citation

United States. Department of Commerce. (1931). North American broadcasting stations by frequencies (corrected to Feb. 15, 1931). [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Department of Commerce. North American Broadcasting Stations by Frequencies (corrected to Feb. 15, 1931). [Washington]: [publisher not identified], 1931.

MLA (9th ed.) Citation

United States. Department of Commerce. North American Broadcasting Stations by Frequencies (corrected to Feb. 15, 1931). [publisher not identified], 1931.

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