Olson, D. R. (1970). Cognitive development: The child's acquisition of diagonality. Academic Press.
Chicago-Zitierstil (17. Ausg.)Olson, David R. Cognitive Development: The Child's Acquisition of Diagonality. New York: Academic Press, 1970.
MLA-Zitierstil (9. Ausg.)Olson, David R. Cognitive Development: The Child's Acquisition of Diagonality. Academic Press, 1970.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.