MLA

Postcard of Edwin R. Monett and Charles Russell with the Open Boat They Used to Run the Colorado River from Utah to California in 1907 and 1908. Tom Jones, published by Fred Harvey, 0AD. https://collections.library.yale.edu/catalog/2015646.

APA, 6th edition

Postcard of Edwin R. Monett and Charles Russell with the open boat they used to run the Colorado river from Utah to California in 1907 and 1908. (0 C.E.). [Pictorial works, Portraits, Postcards, Halftone photomechanical prints]. Tom Jones, published by Fred Harvey. https://collections.library.yale.edu/catalog/2015646.