Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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