Prutzman, P., Stern, L., Burger, M. L., Bodenhamer, G., & McMurray, D. (1988). The friendly classroom for a small planet: A handbook on creative approaches to living and problem solving for children (Second trade edition.). New Society Publishers.
Cita Chicago (17th ed.)Prutzman, Priscilla, Lee Stern, M. Leonard Burger, Gretchen Bodenhamer, i Dana McMurray. The Friendly Classroom for a Small Planet: A Handbook on Creative Approaches to Living and Problem Solving for Children. Second trade edition. Philadelphia, PA: New Society Publishers, 1988.
Cita MLA (9th ed.)Prutzman, Priscilla, et al. The Friendly Classroom for a Small Planet: A Handbook on Creative Approaches to Living and Problem Solving for Children. Second trade edition. New Society Publishers, 1988.