Pickhardt, C. E. (2005). The Everything Parent's guide to the Strong willed Child. Adams Media.
Lua i Stíl Chicago (17ú heag.)Pickhardt, Carl E. The Everything Parent's Guide to the Strong Willed Child. Massachuse tts: Adams Media, 2005.
Lua MLA (9ú heag.)Pickhardt, Carl E. The Everything Parent's Guide to the Strong Willed Child. Adams Media, 2005.
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