Northwest Airlines Schedule 1941 December 1
MLA
Northwest Airlines. "Northwest Airlines Schedule 1941 December 1." Delta Flight Museum. 1941-12-01, https://dlg.galileo.usg.edu/do:delta_nwa-tt_nwa-tt-19411201.
APA
Northwest Airlines (1941-12-01). Northwest Airlines Schedule 1941 December 1. Retrieved from https://dlg.galileo.usg.edu/do:delta_nwa-tt_nwa-tt-19411201
Chicago
Northwest Airlines. "Northwest Airlines Schedule 1941 December 1." 1941-12-01. August 3, 2025. https://dlg.galileo.usg.edu/do:delta_nwa-tt_nwa-tt-19411201.
