APA (7th ed.) Citation

Barnum, P. T. (1866). The humbugs of the world by P.T. Barnum. John Camden Hotten.

Chicago Style (17th ed.) Citation

Barnum, P. T. The Humbugs of the World by P.T. Barnum. London: John Camden Hotten, 1866.

MLA (9th ed.) Citation

Barnum, P. T. The Humbugs of the World by P.T. Barnum. John Camden Hotten, 1866.

Warning: These citations may not always be 100% accurate.