The Bielefeld interdisciplinary project & Immelmann, K. (1981). Behavioral development: The Bielefeld Interdisciplinary project. Cambridge University Press.
Čikaški stil citiranja (17. izdanje)The Bielefeld interdisciplinary project i Klaus Immelmann. Behavioral Development: The Bielefeld Interdisciplinary Project. New York: Cambridge University Press, 1981.
MLA način citiranja (9. izdanje)The Bielefeld interdisciplinary project i Klaus Immelmann. Behavioral Development: The Bielefeld Interdisciplinary Project. Cambridge University Press, 1981.
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