APA (7th ed.) Citation

United States. Coast Guard. (1920). Amendments to Telephone instructions. GPO.

Chicago Style (17th ed.) Citation

United States. Coast Guard. Amendments to Telephone Instructions. [Washington]: GPO, 1920.

MLA (9th ed.) Citation

United States. Coast Guard. Amendments to Telephone Instructions. GPO, 1920.

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