APA (7th ed.) Citation

Permanent International Association of Road Congresses. (1930). Most recent methods adopted for use of tar, bitumen, and asphalt in road construction. U.S. GPO.

Chicago Style (17th ed.) Citation

Permanent International Association of Road Congresses. Most Recent Methods Adopted for Use of Tar, Bitumen, and Asphalt in Road Construction. Washington: U.S. GPO, 1930.

MLA (9th ed.) Citation

Permanent International Association of Road Congresses. Most Recent Methods Adopted for Use of Tar, Bitumen, and Asphalt in Road Construction. U.S. GPO, 1930.