Delta Air Lines System Timetable April 1, 1992
MLA
Delta Air Lines, Inc.. "Delta Air Lines System Timetable April 1, 1992." Delta Flight Museum. 1992-04-01, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19920401.
APA
Delta Air Lines, Inc. (1992-04-01). Delta Air Lines System Timetable April 1, 1992. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19920401
Chicago
Delta Air Lines, Inc.. "Delta Air Lines System Timetable April 1, 1992." 1992-04-01. May 2, 2026. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19920401.
