APA (7th ed.) Citation

United States. Public Roads Administration. (1941). Public roads, a journal of highway research, Mar. 1941. [s.n.].

Chicago Style (17th ed.) Citation

United States. Public Roads Administration. Public Roads, a Journal of Highway Research, Mar. 1941. [Washington]: [s.n.], 1941.

MLA (9th ed.) Citation

United States. Public Roads Administration. Public Roads, a Journal of Highway Research, Mar. 1941. [s.n.], 1941.