Blank, Postcard, "The Busy Man's Creed. . . Elbert Hubbard," [n.d.].

Chicago citation style
Hubbard, Elbert, 1856-1915. Blank, Postcard, "The Busy Man's Creed. . . Elbert Hubbard," [n.d.].. Retrieved from the Digital Public Library of America, https://digital.library.villanova.edu/Record/vudl:91882. (Accessed September 21, 2018.)
APA citation style
Hubbard, Elbert, 1856-1915, Blank, Postcard, "The Busy Man's Creed. . . Elbert Hubbard," [n.d.].. Retrieved from the Digital Public Library of America, https://digital.library.villanova.edu/Record/vudl:91882
MLA citation style
Hubbard, Elbert, 1856-1915. Retrieved from the Digital Public Library of America <https://digital.library.villanova.edu/Record/vudl:91882>.
Note: These citations are programmatically generated and may be incomplete.