Delta Air Lines System Timetable 1961 June 11
MLA
Delta Air Lines, Inc.. "Delta Air Lines System Timetable 1961 June 11." Delta Flight Museum. 1961-06-11, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19610611.
APA
Delta Air Lines, Inc. (1961-06-11). Delta Air Lines System Timetable 1961 June 11. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19610611
Chicago
Delta Air Lines, Inc.. "Delta Air Lines System Timetable 1961 June 11." 1961-06-11. July 29, 2025. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19610611.