C.A. Cingria. “Pneumatique.” No source, 1 mai 1935. [7638-2]
MLA
C.A. Cingria. “Pneumatique.” No Source, 1 Mai 1935. [7638-2]. 1935. https://collections.library.yale.edu/catalog/10660901.
APA, 6th edition
C.A. Cingria. “Pneumatique.” No source, 1 mai 1935. [7638-2]. (1935). [Scrapbooks]. https://collections.library.yale.edu/catalog/10660901.