Cita APA (7a ed.)

Smith, G. (1964). Natural theology: Metaphysics II (6th printing.). MacMillan Company.

Cita Chicago Style (17a ed.)

Smith, Gerard. Natural Theology: Metaphysics II. 6th printing. New York: MacMillan Company, 1964.

Cita MLA (9a ed.)

Smith, Gerard. Natural Theology: Metaphysics II. 6th printing. MacMillan Company, 1964.