Perry, W. G. (1970). Forms of intellectual and ethical development in the college years: Scheme. Holt Rinehart and Winston.
Citace podle Chicago (17th ed.)Perry, William G. Forms of Intellectual and Ethical Development in the College Years: Scheme. New York: Holt Rinehart and Winston, 1970.
Citace podle MLA (9th ed.)Perry, William G. Forms of Intellectual and Ethical Development in the College Years: Scheme. Holt Rinehart and Winston, 1970.
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