MLA

Darrot, Paul Jean Gaston, 1892-1958. Avion vu d'une autre avion (a plane seen from another plane) (#989). Box 2, folder 9. circa 1914-circa 1918. https://collections.library.yale.edu/catalog/10616859.

APA, 6th edition

Darrot, Paul Jean Gaston, 1892-1958. (["Box 2, folder 9"])(circa 1914-circa 1918)[Avion vu d'une autre avion (a plane seen from another plane) (#989)]. https://collections.library.yale.edu/catalog/10616859.