Não informado. (2004). Teaching thinking & problem solving. Research for Better Schools.
Chicago-Zitierstil (17. Ausg.)Não informado. Teaching Thinking & Problem Solving. Philadelphia, Pa: Research for Better Schools, 2004.
MLA-Zitierstil (8. Ausg.)Não informado. Teaching Thinking & Problem Solving. Research for Better Schools, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.