Wyckoff, J., & Unell, B. C. (2002). Discipline without shouting or spanking: Practical solutions to the most common preschool behavior problems (Rev. and expanded ed.). Hinkler Books.
Citace podle Chicago (17th ed.)Wyckoff, Jerry, a Barbara C. Unell. Discipline Without Shouting or Spanking: Practical Solutions to the Most Common Preschool Behavior Problems. Rev. and expanded ed. Dingley, Victoria: Hinkler Books, 2002.
Citace podle MLA (9th ed.)Wyckoff, Jerry, a Barbara C. Unell. Discipline Without Shouting or Spanking: Practical Solutions to the Most Common Preschool Behavior Problems. Rev. and expanded ed. Hinkler Books, 2002.
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