Delta Air Lines System Timetable 1934 September 1
MLA
Delta Air Corporation. "Delta Air Lines System Timetable 1934 September 1." Delta Flight Museum. 1934-09-01, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19340901.
APA
Delta Air Corporation (1934-09-01). Delta Air Lines System Timetable 1934 September 1. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19340901
Chicago
Delta Air Corporation. "Delta Air Lines System Timetable 1934 September 1." 1934-09-01. May 1, 2026. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19340901.
