Gaya APA

Bouma, P, J, P, J., Covey, S, R. (1997). The 7 Habits of Highty Effective Families . New York: Golden Books.

Gaya MLA

Bouma, P., J., Pieter, Johannes., Covey, Stephen, R.. "The 7 Habits of Highty Effective Families". New York: Golden Books, 1997. Text.