APA (7th ed.) Citation

Purtill, R. L. (1972). Logical Thinking (2. print.). Harper Row.

Chicago Style (17th ed.) Citation

Purtill, Richard L. Logical Thinking. 2. print. New York: Harper Row, 1972.

MLA (9th ed.) Citation

Purtill, Richard L. Logical Thinking. 2. print. Harper Row, 1972.