The humbugs of the world. [electronic resource] An account of humbugs, delusions,impositions, quackeries, deceits and deceivers generally, in all ages./

Chicago citation style
Barnum, P. T. (Phineas Taylor), 1810-1891. The humbugs of the world. [electronic resource] An account of humbugs, delusions,impositions, quackeries, deceits and deceivers generally, in all ages./. 1866. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/001379030. (Accessed November 15, 2018.)
APA citation style
Barnum, P. T. (Phineas Taylor), 1810-1891, (1866) The humbugs of the world. [electronic resource] An account of humbugs, delusions,impositions, quackeries, deceits and deceivers generally, in all ages./. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/001379030
MLA citation style
Barnum, P. T. (Phineas Taylor), 1810-1891. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/001379030>.
Note: These citations are programmatically generated and may be incomplete.