Delta Air Lines System Timetable 1969 April 27
MLA
Delta Air Lines, Inc.. "Delta Air Lines System Timetable 1969 April 27." Delta Flight Museum. 1969-04-27, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19690427.
APA
Delta Air Lines, Inc. (1969-04-27). Delta Air Lines System Timetable 1969 April 27. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19690427
Chicago
Delta Air Lines, Inc.. "Delta Air Lines System Timetable 1969 April 27." 1969-04-27. August 10, 2025. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19690427.
