APA (7th ed.) Citation

Martin, C. B. (1976). God, the Null Set, and Divine Simplicity. The challenge of religion today, 138-143.

Chicago Style (17th ed.) Citation

Martin, Charles B. "God, the Null Set, and Divine Simplicity." The Challenge of Religion Today 1976: 138-143.

MLA (9th ed.) Citation

Martin, Charles B. "God, the Null Set, and Divine Simplicity." The Challenge of Religion Today, 1976, pp. 138-143.