Cita APA

Proctor, R., & White, T. L. (1946). Rock tunneling with steel supports. The Commercial Shering & Stamping.

Citación estilo Chicago

Proctor, R., and T. L. White. Rock Tunneling With Steel Supports. Youngstown: The Commercial Shering & Stamping, 1946.

Cita MLA

Proctor, R., and T. L. White. Rock Tunneling With Steel Supports. Youngstown: The Commercial Shering & Stamping, 1946.