Jewell, P. A. (1966). Play, exploration and territory in mammals: The proceedings of a symposium held at the Zoological Society of London on 19 and 20 November 1965 ([U.S. ed.). Academic Press.
Chicago-viite (17. p.)Jewell, Peter Arundel. Play, Exploration and Territory in Mammals: The Proceedings of a Symposium Held at the Zoological Society of London on 19 and 20 November 1965. [U.S. ed. New York]: Academic Press, 1966.
MLA-viite (9. p.)Jewell, Peter Arundel. Play, Exploration and Territory in Mammals: The Proceedings of a Symposium Held at the Zoological Society of London on 19 and 20 November 1965. [U.S. ed. Academic Press, 1966.
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