Underwood & Underwood, New York, NY Press photo of group, including Igor Sikorsky, watching a man play a piano next to a Sikorsky S-29A biplane. Early 20th century photograph 8 x 10
MLA
Simpson, Randolph Linsly, 1927-1992. Underwood & Underwood, New York, NY Press photo of group, including Igor Sikorsky, watching a man play a piano next to a Sikorsky S-29A biplane. Early 20th century photograph 8 x 10. Box 23, folder 980. 1925 April 24. https://collections.library.yale.edu/catalog/16191655.
APA, 6th edition
Simpson, Randolph Linsly, 1927-1992. (["Box 23, folder 980"])(1925 April 24)[Underwood & Underwood, New York, NY Press photo of group, including Igor Sikorsky, watching a man play a piano next to a Sikorsky S-29A biplane. Early 20th century photograph 8 x 10]. https://collections.library.yale.edu/catalog/16191655.
