APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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