APA (7th ed.) Citation

United States. Post Office Department. (1915). Postal laws and regulations pertaining to 2nd class of mail matter (corrected to Oct. 1, 1915). GPO.

Chicago Style (17th ed.) Citation

United States. Post Office Department. Postal Laws and Regulations Pertaining to 2nd Class of Mail Matter (corrected to Oct. 1, 1915). [Washington]: GPO, 1915.

MLA (9th ed.) Citation

United States. Post Office Department. Postal Laws and Regulations Pertaining to 2nd Class of Mail Matter (corrected to Oct. 1, 1915). GPO, 1915.