Lipman, M., Sharp, A. M., & Oscanyan, F. S. (1980). Philosophy in the classroom (2nd ed.). Philadelphia: Temple University Press.
Trích dẫn kiểu ChicagoLipman, Matthew., Ann Margaret Sharp, và Frederick S. Oscanyan. Philosophy in the Classroom. 2nd ed. Philadelphia: Temple University Press, 1980.
Deismireacht MLALipman, Matthew., Ann Margaret Sharp, và Frederick S. Oscanyan. Philosophy in the Classroom. 2nd ed. Philadelphia: Temple University Press, 1980.
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