Valletutti, P. J. (1979). Individuslizing educational objectives and Programs: A modular approach. University park Pr..
Chicago-viite (17. p.)Valletutti, Peter J. Individuslizing Educational Objectives and Programs: A Modular Approach. Baltimore: University park Pr., 1979.
MLA-viite (9. p.)Valletutti, Peter J. Individuslizing Educational Objectives and Programs: A Modular Approach. University park Pr., 1979.
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