Ord, J. E. (1972). Elementary school social studies for today's children. Harper & Row.
Chicagoスタイル(17版)引用形式Ord, John E. Elementary School Social Studies for Today's Children. New York: Harper & Row, 1972.
MLA(9版)引用形式Ord, John E. Elementary School Social Studies for Today's Children. Harper & Row, 1972.
警告: この引用は必ずしも正確ではありません.