APA (7th ed.) Citation

United States. Post Office Department. (1927). Scheme of separation for Boston postal district. P.O. Print.

Chicago Style (17th ed.) Citation

United States. Post Office Department. Scheme of Separation for Boston Postal District. Boston: P.O. Print, 1927.

MLA (9th ed.) Citation

United States. Post Office Department. Scheme of Separation for Boston Postal District. P.O. Print, 1927.

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