Cita APA (7a ed.)

Lewis, R. S. (1939). Mining, the priceless heritage. Extension Division, University of Utah.

Cita Chicago Style (17a ed.)

Lewis, Robert S. Mining, the Priceless Heritage. Salt Lake City: Extension Division, University of Utah, 1939.

Cita MLA (8a ed.)

Lewis, Robert S. Mining, the Priceless Heritage. Extension Division, University of Utah, 1939.