Scheffler, I. (1978). Conditions of knowledge: An introduction to epistemology and education (Phoenix edition.). The University of Chicago Press.
Citazione stile Chigago Style (17a edizione)Scheffler, Israel. Conditions of Knowledge: An Introduction to Epistemology and Education. Phoenix edition. Chicago ; London: The University of Chicago Press, 1978.
Citatione MLA (9a ed.)Scheffler, Israel. Conditions of Knowledge: An Introduction to Epistemology and Education. Phoenix edition. The University of Chicago Press, 1978.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.