APA ציטוט

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

Chicago Style (17th ed.) Citation

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

ציטוט MLA

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