APA (7th ed.) Citation

United States. Government Printing Office. (1906). Simplified spelling, 1st edition. GPO.

Chicago Style (17th ed.) Citation

United States. Government Printing Office. Simplified Spelling, 1st Edition. [Washington]: GPO, 1906.

MLA (9th ed.) Citation

United States. Government Printing Office. Simplified Spelling, 1st Edition. GPO, 1906.

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