APA (7th ed.) Citation

Sendak, M. (1967). Higglety pigglety pop!: Or, There must be more to life. Harper & Row.

Chicago Style (17th ed.) Citation

Sendak, Maurice. Higglety Pigglety Pop!: Or, There Must Be More to Life. [New York]: Harper & Row, 1967.

MLA (9th ed.) Citation

Sendak, Maurice. Higglety Pigglety Pop!: Or, There Must Be More to Life. Harper & Row, 1967.