APA (7th ed.) Citation

Lewis, H. R. (1979). Unsolvable classes of quantificational formulas / Harry R. Lewis. Addison-Wesley Pub. Co.

Chicago Style (17th ed.) Citation

Lewis, Harry R. Unsolvable Classes of Quantificational Formulas / Harry R. Lewis. London: Addison-Wesley Pub. Co, 1979.

MLA (9th ed.) Citation

Lewis, Harry R. Unsolvable Classes of Quantificational Formulas / Harry R. Lewis. Addison-Wesley Pub. Co, 1979.

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