Παραπομπή APA

Proctor, R. V., White, T. L., & Terzaghi, K. (1946). Rock tunneling with steel supports. Youngstown, OH: Commercial Shearing & Stamping Co..

Παραπομπή Chicago Style

Proctor, R. V., T. L. White, and Karl Terzaghi. Rock Tunneling With Steel Supports. Youngstown, OH: Commercial Shearing & Stamping Co., 1946.

Παραπομπή MLA

Proctor, R. V., T. L. White, and Karl Terzaghi. Rock Tunneling With Steel Supports. Youngstown, OH: Commercial Shearing & Stamping Co., 1946.

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