Cite

151. Balloon Study, 1916 [close up of gondola]

MLA

Freeman, Walter, 1895-1972. 151. Balloon Study, 1916 [close up of gondola]. 1, folder 15. 1912-1916. https://collections.library.yale.edu/catalog/10011044.

APA, 6th edition

Freeman, Walter, 1895-1972. (["1, folder 15"])(1912-1916)[151. Balloon Study, 1916 [close up of gondola]]. https://collections.library.yale.edu/catalog/10011044.