Cita APA (7a ed.)

Orígenes, c. 1. 2., & Behr, J. (2017). On first principles (1st ed., 6a imp.). Oxford University Press.

Cita Chicago Style (17a ed.)

Orígenes, ca. 185-ca. 254, y John Behr. On First Principles. 1st ed., 6a imp. Oxford, UK: Oxford University Press, 2017.

Cita MLA (9a ed.)

Orígenes, ca. 185-ca. 254, y John Behr. On First Principles. 1st ed., 6a imp. Oxford University Press, 2017.