Buendia, L. E. (2001). Play to learn, learn to play. Raintree Trading and Pub.
Chicago-viite (17. p.)Buendia, Lydia E. Play to Learn, Learn to Play. [s.l.]: Raintree Trading and Pub, 2001.
MLA-viite (9. p.)Buendia, Lydia E. Play to Learn, Learn to Play. Raintree Trading and Pub, 2001.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.