APA (7th ed.) Citation

United States. Government Printing Office. (1931). How of line cuts and half tones. GPO.

Chicago Style (17th ed.) Citation

United States. Government Printing Office. How of Line Cuts and Half Tones. [Washington]: GPO, 1931.

MLA (9th ed.) Citation

United States. Government Printing Office. How of Line Cuts and Half Tones. GPO, 1931.

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