Wertheimer, M. (1959). Productive thinking (enlarged ed.). Harper & Brothers publishers.
Chicagoスタイル(17版)引用形式Wertheimer, Max. Productive Thinking. enlarged ed. New York: Harper & Brothers publishers, 1959.
MLA(9版)引用形式Wertheimer, Max. Productive Thinking. enlarged ed. Harper & Brothers publishers, 1959.
警告: この引用は必ずしも正確ではありません.