Cite

On the Mexican border, Mexican fighters in their trenches

MLA

H.H. Stratton (Firm). On the Mexican border, Mexican fighters in their trenches. Folder 19. undated. https://collections.library.yale.edu/catalog/2017115.

APA, 6th edition

H.H. Stratton (Firm). (["Folder 19"])(undated)[On the Mexican border, Mexican fighters in their trenches]. https://collections.library.yale.edu/catalog/2017115.