Drifte, C. (2004). Encouraging positive behaviour in the early years: A practical guide. Paul Chapman Publishing.
Lua i Stíl Chicago (17ú heag.)Drifte, Collette. Encouraging Positive Behaviour in the Early Years: A Practical Guide. Thousand Oaks, CA: Paul Chapman Publishing, 2004.
Lua MLA (8ú heag.)Drifte, Collette. Encouraging Positive Behaviour in the Early Years: A Practical Guide. Paul Chapman Publishing, 2004.
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