Delta Air Lines System Timetable February 1, 1987
MLA
Delta Air Lines, Inc.. "Delta Air Lines System Timetable February 1, 1987." Delta Flight Museum. 1987-02-01, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19870201.
APA
Delta Air Lines, Inc. (1987-02-01). Delta Air Lines System Timetable February 1, 1987. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19870201
Chicago
Delta Air Lines, Inc.. "Delta Air Lines System Timetable February 1, 1987." 1987-02-01. May 1, 2026. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19870201.
