Each peach pear plum :
an "I spy" story /
Janet and Allan Ahlberg.
APA Citation
Ahlberg, J., Ahlberg, A. (19791978). Each peach pear plum: an "I spy" story. [1st American ed.] New York: Viking Press.
MLA Citation
Ahlberg, Janet, and Allan Ahlberg. Each Peach Pear Plum: an "I Spy" Story. [1st American ed.] New York: Viking Press, 19791978.
Warning: These citations may not always be complete (especially for serials).