Harris, M. (1987). Ernie and Bert's Red Book: Open Sesame - Stage F. Oxford University Press.
Chicago-čujuhus (17. p.)Harris, Maureen. Ernie and Bert's Red Book: Open Sesame - Stage F. New York: Oxford University Press, 1987.
MLA-čujuhus (9. p.)Harris, Maureen. Ernie and Bert's Red Book: Open Sesame - Stage F. Oxford University Press, 1987.
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