Kail, R. V. (2001). Children and their development (2nd ed.). Prentice Hall.
Chicago-viite (17. p.)Kail, Robert V. Children and Their Development. 2nd ed. Upper Saddle River, N.J: Prentice Hall, 2001.
MLA-viite (9. p.)Kail, Robert V. Children and Their Development. 2nd ed. Prentice Hall, 2001.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.