Delta Air Service, Inc. Schedules and Tariffs June 17, 1930
MLA
Delta Air Service. "Delta Air Service, Inc. Schedules and Tariffs June 17, 1930." Delta Flight Museum. 1930-06-17, https://dlg.galileo.usg.edu/do:delta_das_das-tt-19300617.
APA
Delta Air Service (1930-06-17). Delta Air Service, Inc. Schedules and Tariffs June 17, 1930. Retrieved from https://dlg.galileo.usg.edu/do:delta_das_das-tt-19300617
Chicago
Delta Air Service. "Delta Air Service, Inc. Schedules and Tariffs June 17, 1930." 1930-06-17. May 13, 2026. https://dlg.galileo.usg.edu/do:delta_das_das-tt-19300617.
