APA-Zitierstil (7. Ausg.)

(1976). Play: Its role in development and evolution (1. publ.). Basic Books.

Chicago-Zitierstil (17. Ausg.)

Play: Its Role in Development and Evolution. 1. publ. New York: Basic Books, 1976.

MLA-Zitierstil (9. Ausg.)

Play: Its Role in Development and Evolution. 1. publ. Basic Books, 1976.