APA (7th ed.) Citation

Purtill, R. L. (1972). Logical thinking. Harper & Row.

Chicago Style (17th ed.) Citation

Purtill, Richard L. Logical Thinking. New York: Harper & Row, 1972.

MLA (9th ed.) Citation

Purtill, Richard L. Logical Thinking. Harper & Row, 1972.

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