Delta Air Lines System Timetable 1956 December 2
MLA
Delta Air Lines, Inc.. "Delta Air Lines System Timetable 1956 December 2." Delta Flight Museum. 1956-12-02, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19561202.
APA
Delta Air Lines, Inc. (1956-12-02). Delta Air Lines System Timetable 1956 December 2. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19561202
Chicago
Delta Air Lines, Inc.. "Delta Air Lines System Timetable 1956 December 2." 1956-12-02. August 17, 2025. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19561202.
