Delta Air Lines System Timetable July 1, 1988
MLA
Delta Air Lines, Inc.. "Delta Air Lines System Timetable July 1, 1988." Delta Flight Museum. 1988-07-01, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19880701.
APA
Delta Air Lines, Inc. (1988-07-01). Delta Air Lines System Timetable July 1, 1988. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19880701
Chicago
Delta Air Lines, Inc.. "Delta Air Lines System Timetable July 1, 1988." 1988-07-01. May 1, 2026. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19880701.
