Northwest Airlines Schedule 1941 April
MLA
Northwest Airlines. "Northwest Airlines Schedule 1941 April." Delta Flight Museum. 1941-04, https://dlg.galileo.usg.edu/do:delta_nwa-tt_nwa-tt-194104.
APA
Northwest Airlines (1941-04). Northwest Airlines Schedule 1941 April. Retrieved from https://dlg.galileo.usg.edu/do:delta_nwa-tt_nwa-tt-194104
Chicago
Northwest Airlines. "Northwest Airlines Schedule 1941 April." 1941-04. August 2, 2025. https://dlg.galileo.usg.edu/do:delta_nwa-tt_nwa-tt-194104.
