Cite

Castle of San Juan D'ulloa. Vera Cruz, Mex

MLA

Trenkle, Ernest J. Castle of San Juan D'Ulloa. Vera Cruz, Mex. 1913. https://collections.library.yale.edu/catalog/2017176.

APA, 6th edition

Trenkle, E. J. (1913). Castle of San Juan D'ulloa. Vera Cruz, Mex [Photographic postcards, Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2017176.