APA (7th ed.) Citation

United States. Post Office Department. (1911). Postal laws and regulations pertaining to 2nd class of mail matter (corrected to Feb. 1, 1911). [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Post Office Department. Postal Laws and Regulations Pertaining to 2nd Class of Mail Matter (corrected to Feb. 1, 1911). [Washington]: [publisher not identified], 1911.

MLA (9th ed.) Citation

United States. Post Office Department. Postal Laws and Regulations Pertaining to 2nd Class of Mail Matter (corrected to Feb. 1, 1911). [publisher not identified], 1911.