Gordon, T. (1970). P E T parent effectiveness training: The tested new way to raiseresponsible children. Peter H. Wyden.
Lua i Stíl Chicago (17ú heag.)Gordon, Thomas. P E T Parent Effectiveness Training: The Tested New Way to Raiseresponsible Children. Peter H. Wyden, 1970.
Lua MLA (9ú heag.)Gordon, Thomas. P E T Parent Effectiveness Training: The Tested New Way to Raiseresponsible Children. Peter H. Wyden, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.