Delta Air Lines System Timetable 1977 October 30
MLA
Delta Air Lines, Inc.. "Delta Air Lines System Timetable 1977 October 30." Delta Flight Museum. 1977-10-30, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19771030.
APA
Delta Air Lines, Inc. (1977-10-30). Delta Air Lines System Timetable 1977 October 30. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19771030
Chicago
Delta Air Lines, Inc.. "Delta Air Lines System Timetable 1977 October 30." 1977-10-30. July 29, 2025. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19771030.
