Northwest Airlines Schedule 1941 June 1
MLA
Northwest Airlines. "Northwest Airlines Schedule 1941 June 1." Delta Flight Museum. 1941-06-01, https://dlg.galileo.usg.edu/do:delta_nwa-tt_nwa-tt-19410601.
APA
Northwest Airlines (1941-06-01). Northwest Airlines Schedule 1941 June 1. Retrieved from https://dlg.galileo.usg.edu/do:delta_nwa-tt_nwa-tt-19410601
Chicago
Northwest Airlines. "Northwest Airlines Schedule 1941 June 1." 1941-06-01. October 8, 2026. https://dlg.galileo.usg.edu/do:delta_nwa-tt_nwa-tt-19410601.
