503. Placer gold fields, Sonora, California
MLA
503. Placer Gold Fields, Sonora, California. 1908. https://collections.library.yale.edu/catalog/2011303.
APA, 6th edition
503. Placer gold fields, Sonora, California. (1908). [Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2011303.