Williams, R. (1989). The trusting heart great news about tipe a behavior. Times Books.
Cita Chicago (17th ed.)Williams, Redford. The Trusting Heart Great News About Tipe a Behavior. Times Books, 1989.
Cita MLA (9th ed.)Williams, Redford. The Trusting Heart Great News About Tipe a Behavior. Times Books, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.