Dyfyniad APA

Century of Progress International Exposition Chicago, Ill., & Century of Progress, inc., Chicago. (1934). A Century of progress exposition, Chicago, official pictures in color. A Century of Progress.

Dyfyniad Arddull Chicago

Century of Progress International Exposition Chicago, Ill., and inc. Century of Progress. A Century of Progress Exposition, Chicago, Official Pictures in Color. Chicago: A Century of Progress, 1934.

Dyfyniad MLA

Century of Progress International Exposition Chicago, Ill., and inc. Century of Progress. A Century of Progress Exposition, Chicago, Official Pictures in Color. A Century of Progress, 1934.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.