Delta Air Lines System Timetable June 1, 1988
MLA
Delta Air Lines, Inc.. "Delta Air Lines System Timetable June 1, 1988." Delta Flight Museum. 1988-06-01, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19880601.
APA
Delta Air Lines, Inc. (1988-06-01). Delta Air Lines System Timetable June 1, 1988. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19880601
Chicago
Delta Air Lines, Inc.. "Delta Air Lines System Timetable June 1, 1988." 1988-06-01. May 10, 2026. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19880601.
