Pacific Northern Airlines, Inc. Annual Report to Stockholders 1949
MLA
Pacific Northern Airlines, Inc.. "Pacific Northern Airlines, Inc. Annual Report to Stockholders 1949." Delta Flight Museum. 1950-04-14, https://dlg.galileo.usg.edu/do:delta_pna-ar_pna-ar-1949.
APA
Pacific Northern Airlines, Inc. (1950-04-14). Pacific Northern Airlines, Inc. Annual Report to Stockholders 1949. Retrieved from https://dlg.galileo.usg.edu/do:delta_pna-ar_pna-ar-1949
Chicago
Pacific Northern Airlines, Inc.. "Pacific Northern Airlines, Inc. Annual Report to Stockholders 1949." 1950-04-14. August 1, 2025. https://dlg.galileo.usg.edu/do:delta_pna-ar_pna-ar-1949.
