Citazione APA

Century of Progress International Exposition. (1934). 1934, Century of Progress. Western Newspaper Union.

Stile di citazione Chicago

Century of Progress International Exposition. 1934, Century of Progress. [Chicago, Ill.]: Western Newspaper Union, 1934.

Citazione MLA

Century of Progress International Exposition. 1934, Century of Progress. Western Newspaper Union, 1934.