APA (7th ed.) Citation

Keats, J., & Keats, E. J. (1965). The naughty boy: A poem. Viking Press.

Chicago Style (17th ed.) Citation

Keats, John, and Ezra Jack Keats. The Naughty Boy: A Poem. New York: Viking Press, 1965.

MLA (9th ed.) Citation

Keats, John, and Ezra Jack Keats. The Naughty Boy: A Poem. Viking Press, 1965.