APA (7th ed.) Citation

Permanent International Association of Road Congresses. (1930). American Organizing Commission, 6th Congress, Permanent International Association of Road Congresses. U.S. GPO.

Chicago Style (17th ed.) Citation

Permanent International Association of Road Congresses. American Organizing Commission, 6th Congress, Permanent International Association of Road Congresses. Washington: U.S. GPO, 1930.

MLA (9th ed.) Citation

Permanent International Association of Road Congresses. American Organizing Commission, 6th Congress, Permanent International Association of Road Congresses. U.S. GPO, 1930.