APA (7th ed.) Citation

Putnam, G. R. (1931). Radiobeacons and radiobeacon navigation. United States Government Printing Office.

Chicago Style (17th ed.) Citation

Putnam, George R. Radiobeacons and Radiobeacon Navigation. Washington, D.C: United States Government Printing Office, 1931.

MLA (9th ed.) Citation

Putnam, George R. Radiobeacons and Radiobeacon Navigation. United States Government Printing Office, 1931.

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