Citace podle APA (7th ed.)

Ruggiero, V. R. (2001). The art of thinking: A guide to critical and creative thought (6th ed.). Longman.

Citace podle Chicago (17th ed.)

Ruggiero, Vincent R. The Art of Thinking: A Guide to Critical and Creative Thought. 6th ed. New York: Longman, 2001.

Citace podle MLA (9th ed.)

Ruggiero, Vincent R. The Art of Thinking: A Guide to Critical and Creative Thought. 6th ed. Longman, 2001.

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