Cite

"The Round the World Fliers"

MLA

Williams, William Carlos, 1883-1963. "The Round the World Fliers". Box 44, folder 1109. undated. https://collections.library.yale.edu/catalog/17049588.

APA, 6th edition

Williams, William Carlos, 1883-1963. (["Box 44, folder 1109"])(undated)["The Round the World Fliers"]. https://collections.library.yale.edu/catalog/17049588.