Essa, E. (1999). A practical guide to solving preschool behavior problems (4th ed.). Delmar Publishers.
Citace podle Chicago (17th ed.)Essa, Eva. A Practical Guide to Solving Preschool Behavior Problems. 4th ed. Albany, N.Y: Delmar Publishers, 1999.
Citace podle MLA (9th ed.)Essa, Eva. A Practical Guide to Solving Preschool Behavior Problems. 4th ed. Delmar Publishers, 1999.
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