APA

Kretzmann N., . (1993). The Cambridge companion to Aquinas. New York, NY, USA: Cambridge University Press.

Chicago

Kretzmann Norman, . 1993. The Cambridge companion to Aquinas. New York, NY, USA: Cambridge University Press.

Harvard

Kretzmann N., . (1993). The Cambridge companion to Aquinas. New York, NY, USA: Cambridge University Press.

MLA

Kretzmann Norman, . The Cambridge companion to Aquinas. New York, NY, USA: Cambridge University Press. 1993.