Cita APA (7a ed.)

Ahlberg, J., & Ahlberg, A. (1979). Each peach pear plum: An "I spy" story ([1st American ed.].). Viking Press.

Cita Chicago Style (17a ed.)

Ahlberg, Janet, y Allan Ahlberg. Each Peach Pear Plum: An "I Spy" Story. [1st American ed.]. New York: Viking Press, 1979.

Cita MLA (8a ed.)

Ahlberg, Janet, y Allan Ahlberg. Each Peach Pear Plum: An "I Spy" Story. [1st American ed.]. Viking Press, 1979.