APA (7th ed.) Citation

United States. Post Office Department. (1970). State postal map, Oklahoma. [Post Office Dept.].

Chicago Style (17th ed.) Citation

United States. Post Office Department. State Postal Map, Oklahoma. [Washington]: [Post Office Dept.], 1970.

MLA (8th ed.) Citation

United States. Post Office Department. State Postal Map, Oklahoma. [Post Office Dept.], 1970.

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