APA (7th ed.) Citation

Ankeny, M. J., & Forbes, J. J. V. (1931). Safety cars of U.S. Bureau of Mines. [publisher not identified].

Chicago Style (17th ed.) Citation

Ankeny, M. J., and John Joseph Vincent Forbes. Safety Cars of U.S. Bureau of Mines. Washington, D.C.: [publisher not identified], 1931.

MLA (9th ed.) Citation

Ankeny, M. J., and John Joseph Vincent Forbes. Safety Cars of U.S. Bureau of Mines. [publisher not identified], 1931.