Gaya APA

Gray, J. (1999). Children are from heaven: Positive parenting skills for raising cooperative, confident, and compassionate children. . New York: New York HarperCollins Publishers.

Gaya MLA

Gray, John. "Children are from heaven: Positive parenting skills for raising cooperative, confident, and compassionate children. ". New York: New York HarperCollins Publishers, 1999. Buku.