42. "Two Sisters" San Pablo Bay
MLA
42. "Two Sisters" San Pablo Bay. 0AD. https://collections.library.yale.edu/catalog/2011634.
APA, 6th edition
42. "Two Sisters" San Pablo Bay. (0 C.E.). [Card photographs, Kodak card photographs, Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2011634.