MLA

Mautz, Carl, and collector. Carl Mautz Collection of Cartes-De-Visite Photographs Created by California Photographers. 0AD. https://collections.library.yale.edu/catalog/2014989.

APA, 6th edition

Mautz, C., & collector. (0 C.E.). Carl Mautz collection of cartes-de-visite photographs created by California photographers [Pictorial works, Cartes-de-visite (card photographs), Photographic prints, Studio portraits]. https://collections.library.yale.edu/catalog/2014989.