APA (7th ed.) Citation

(1930). Official United States Tourist Service Highway Map of Washington. United States Tourist Service.

Chicago Style (17th ed.) Citation

Official United States Tourist Service Highway Map of Washington. [S.I.]: United States Tourist Service, 1930.

MLA (8th ed.) Citation

Official United States Tourist Service Highway Map of Washington. United States Tourist Service, 1930.

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