Forgus, R. H. Perception: : the basic process in cognitive development. New York: McGraw-Hill Book Company.
Παραπομπή Chicago StyleForgus, Ronald H. Perception: : The Basic Process in Cognitive Development. New York: McGraw-Hill Book Company.
Παραπομπή MLAForgus, Ronald H. Perception: : The Basic Process in Cognitive Development. New York: McGraw-Hill Book Company.
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