Ripple, R. E. (1964). Learning and human abilities. Harper & Row.
Chicago Edition CitationRipple, Richard E. Learning and Human Abilities. New York: Harper & Row, 1964.
ציטוט MLARipple, Richard E. Learning and Human Abilities. Harper & Row, 1964.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.