APA (7th ed.) Citation

Wertheimer, M. (1959). Productive thinking (Enl. ed.). Harper.

Chicago Style (17th ed.) Citation

Wertheimer, Max. Productive Thinking. Enl. ed. New York: Harper, 1959.

MLA (9th ed.) Citation

Wertheimer, Max. Productive Thinking. Enl. ed. Harper, 1959.

Warning: These citations may not always be 100% accurate.