Cita APA

Proctor, R. V., & White, T. L. (1946). Rock tunneling with steel support. Youngstown: The Younstowne Printing.

Citación estilo Chicago

Proctor, R. V., and T. L. White. Rock Tunneling With Steel Support. Youngstown: The Younstowne Printing, 1946.

Cita MLA

Proctor, R. V., and T. L. White. Rock Tunneling With Steel Support. Youngstown: The Younstowne Printing, 1946.

Precaución: Estas citas no son 100% exactas.