APA (7e ed.) Bronvermelding

Pickhardt, C. E. (2005). The Everything Parent's guide to the Strong willed Child. Adams Media.

Chicago (17e ed.) Bronvermelding

Pickhardt, Carl E. The Everything Parent's Guide to the Strong Willed Child. Massachuse tts: Adams Media, 2005.

MLA (9e ed.) Bronvermelding

Pickhardt, Carl E. The Everything Parent's Guide to the Strong Willed Child. Adams Media, 2005.