Gordon, T. (1975). P.E.T. Parent effectiveness Training: The tested new way to raise responsible children. Penguin.
Citace podle Chicago (17th ed.)Gordon, Thomas. P.E.T. Parent Effectiveness Training: The Tested New Way to Raise Responsible Children. New York: Penguin, 1975.
Citace podle MLA (9th ed.)Gordon, Thomas. P.E.T. Parent Effectiveness Training: The Tested New Way to Raise Responsible Children. Penguin, 1975.
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