MLA

Darrot, Paul Jean Gaston, 1892-1958. Verdun, Boyau allemand conquis (conquered German communication trench) (#845). Box 3, folder 89. circa 1914-circa 1918. https://collections.library.yale.edu/catalog/10616939.

APA, 6th edition

Darrot, Paul Jean Gaston, 1892-1958. (["Box 3, folder 89"])(circa 1914-circa 1918)[Verdun, Boyau allemand conquis (conquered German communication trench) (#845)]. https://collections.library.yale.edu/catalog/10616939.