Cita APA (7a ed.)

Pegis, A. C. (1934). St. Thomas and the problem of the soul in the thirteenth century. Pontifical Institute of Mediaeval Studies.

Cita Chicago Style (17a ed.)

Pegis, Anton Charles. St. Thomas and the Problem of the Soul in the Thirteenth Century. Toronto: Pontifical Institute of Mediaeval Studies, 1934.

Cita MLA (9a ed.)

Pegis, Anton Charles. St. Thomas and the Problem of the Soul in the Thirteenth Century. Pontifical Institute of Mediaeval Studies, 1934.