APA (7th ed.) Citation

Barnum, P. T. (1970). The humbugs of the world. Singing Tree Press.

Chicago Style (17th ed.) Citation

Barnum, Phineas Taylor. The Humbugs of the World. Detroit: Singing Tree Press, 1970.

MLA (9th ed.) Citation

Barnum, Phineas Taylor. The Humbugs of the World. Singing Tree Press, 1970.