Cita APA (7a ed.)

Turnbull, G., & Broadie, A. (2005). The Principles of Moral and Christian Philosophy: In Two Volumes. Liberty Fund.

Cita Chicago Style (17a ed.)

Turnbull, George, y Alexander Broadie. The Principles of Moral and Christian Philosophy: In Two Volumes. Indianapolis: Liberty Fund, 2005.

Cita MLA (8a ed.)

Turnbull, George, y Alexander Broadie. The Principles of Moral and Christian Philosophy: In Two Volumes. Liberty Fund, 2005.