Dyfyniad APA

Wertheimer, M., & Asch, S. E. 1. . . e. (1945). Productive thinking. Harper & brothers.

Dyfyniad Arddull Chicago

Wertheimer, Max, and Solomon Elliott 1907- ed Asch. Productive Thinking. New York: Harper & brothers, 1945.

Dyfyniad MLA

Wertheimer, Max, and Solomon Elliott 1907- ed Asch. Productive Thinking. Harper & brothers, 1945.

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