Groos, K., & Baldwin, E. L. (1911). The play of animals. D. Appleton and Company.
Chicago Style (17th ed.) CitationGroos, Karl, and Elizabeth L. Baldwin. The Play of Animals. New York: D. Appleton and Company, 1911.
MLA (9th ed.) CitationGroos, Karl, and Elizabeth L. Baldwin. The Play of Animals. D. Appleton and Company, 1911.
Warning: These citations may not always be 100% accurate.