Perry, W. G. (1970). Forms of intellectual and ethical development in the college years: Scheme. Holt Rinehart and Winston.
Chicago-čujuhus (17. p.)Perry, William G. Forms of Intellectual and Ethical Development in the College Years: Scheme. New York: Holt Rinehart and Winston, 1970.
MLA-čujuhus (9. p.)Perry, William G. Forms of Intellectual and Ethical Development in the College Years: Scheme. Holt Rinehart and Winston, 1970.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.