Lipman, M., Sharp, A. M., & Oscanyan, F. S. (1980). Philosophy in the classroom (2nd ed.). Philadelphia: Temple University Press.
Παραπομπή Chicago StyleLipman, Matthew., Ann Margaret Sharp, και Frederick S. Oscanyan. Philosophy in the Classroom. 2nd ed. Philadelphia: Temple University Press, 1980.
Παραπομπή MLALipman, Matthew., Ann Margaret Sharp, και Frederick S. Oscanyan. Philosophy in the Classroom. 2nd ed. Philadelphia: Temple University Press, 1980.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.