Two pages of the catalogue of the Air Union Airline. 1926. [5138-1]
MLA
Two Pages of the Catalogue of the Air Union Airline. 1926. [5138-1]. 0AD. https://collections.library.yale.edu/catalog/10656806.
APA, 6th edition
Two pages of the catalogue of the Air Union Airline. 1926. [5138-1]. (0 C.E.). https://collections.library.yale.edu/catalog/10656806.