Online Timetable. December 2015
MLA
Delta Air Lines, Inc.. "Online Timetable. December 2015." Delta Flight Museum. 2015-12, https://dlg.galileo.usg.edu/do:delta_dal-e-tt_dal-tt-201512.
APA
Delta Air Lines, Inc. (2015-12). Online Timetable. December 2015. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-e-tt_dal-tt-201512
Chicago
Delta Air Lines, Inc.. "Online Timetable. December 2015." 2015-12. July 30, 2025. https://dlg.galileo.usg.edu/do:delta_dal-e-tt_dal-tt-201512.
