APA (7 वां संस्करण) प्रशस्ति पत्र
University of Minnesota. Institute of Child Development, ebrary, Inc, Hill, J. P., Pick, A. D., & Collins, W. A. (1969). Minnesota Symposia on Child Psychology: [papers of the annual symposia, 1966-1977, i.e. 1976]. Vol. 2. University of Minnesota Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
University of Minnesota. Institute of Child Development, Inc ebrary, John P. Hill, Anne D. Pick, और W. Andrew Collins. Minnesota Symposia on Child Psychology: [papers of the Annual Symposia, 1966-1977, I.e. 1976]. Vol. 2. Minneapolis [Minn.]: University of Minnesota Press, 1969.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
University of Minnesota. Institute of Child Development, et al. Minnesota Symposia on Child Psychology: [papers of the Annual Symposia, 1966-1977, I.e. 1976]. Vol. 2. University of Minnesota Press, 1969.
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