Hurd, P. D. (1969). New Directions in teaching secondary school science. Rand McNally.
Chicagoスタイル(17版)引用形式Hurd, Paul Dehart. New Directions in Teaching Secondary School Science. Chicago: Rand McNally, 1969.
MLA(9版)引用形式Hurd, Paul Dehart. New Directions in Teaching Secondary School Science. Rand McNally, 1969.
警告: この引用は必ずしも正確ではありません.