Cita APA (7a ed.)

Copleston, F. (1955). Aquinas. Penguin Books.

Cita Chicago Style (17a ed.)

Copleston, Frederick. Aquinas. Harmondsworth, Middlesex [etc.]: Penguin Books, 1955.

Cita MLA (9a ed.)

Copleston, Frederick. Aquinas. Penguin Books, 1955.