Delta Air Lines annual report 1987
MLA
Delta Air Lines, Inc.. "Delta Air Lines annual report 1987." Delta Flight Museum. 1987-08, https://dlg.galileo.usg.edu/do:delta_dal-ar_dal-ar-1987.
APA
Delta Air Lines, Inc. (1987-08). Delta Air Lines annual report 1987. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-ar_dal-ar-1987
Chicago
Delta Air Lines, Inc.. "Delta Air Lines annual report 1987." 1987-08. February 1, 2026. https://dlg.galileo.usg.edu/do:delta_dal-ar_dal-ar-1987.
