Ahlberg, J., & Ahlberg, A. (1979). Each peach pear plum: An "I spy" story ([1st American ed.].). Viking Press.
Lua i Stíl Chicago (17ú heag.)Ahlberg, Janet, agus Allan Ahlberg. Each Peach Pear Plum: An "I Spy" Story. [1st American ed.]. New York: Viking Press, 1979.
Lua MLA (8ú heag.)Ahlberg, Janet, agus Allan Ahlberg. Each Peach Pear Plum: An "I Spy" Story. [1st American ed.]. Viking Press, 1979.
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