Παραπομπή σε μορφή APA (7η εκδ.)

Owens, J., & Gerson, L. P. (2007). Aristotle's gradations of being in Metaphysics. St. Augustine's Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Owens, Joseph, και Lloyd P. Gerson. Aristotle's Gradations of Being in Metaphysics. South Bend, Indiana: St. Augustine's Press, 2007.

Παραπομπή σε μορφή MLA (8th εκδ.)

Owens, Joseph, και Lloyd P. Gerson. Aristotle's Gradations of Being in Metaphysics. St. Augustine's Press, 2007.