APA (7th ed.) Citation

O'Donnell, J. R. (1955). Nine mediaeval thinkers: A collection of Hitherto unedited texts. Pontifical Institute of Mediaeval Studies.

Chicago Style (17th ed.) Citation

O'Donnell, J. Reginald. Nine Mediaeval Thinkers: A Collection of Hitherto Unedited Texts. Toronto: Pontifical Institute of Mediaeval Studies, 1955.

MLA (9th ed.) Citation

O'Donnell, J. Reginald. Nine Mediaeval Thinkers: A Collection of Hitherto Unedited Texts. Pontifical Institute of Mediaeval Studies, 1955.