Cite

Century of Progress International Exposition (1933-1934: Chicago, Illinois)

MLA

Heller, Alfred E. Century of Progress International Exposition (1933-1934: Chicago, Illinois). 1933. https://collections.library.yale.edu/catalog/2029254.

APA, 6th edition

Heller, A. E. (1933). Century of Progress International Exposition (1933-1934: Chicago, Illinois). https://collections.library.yale.edu/catalog/2029254.