Cite

Obusier américain (American howitzer)

MLA

Darrot, Paul Jean Gaston, 1892-1958. Obusier américain (American howitzer). Box 2, folder 66. circa 1914-circa 1918. https://collections.library.yale.edu/catalog/10616916.

APA, 6th edition

Darrot, Paul Jean Gaston, 1892-1958. (["Box 2, folder 66"])(circa 1914-circa 1918)[Obusier américain (American howitzer)]. https://collections.library.yale.edu/catalog/10616916.