Cita APA (7a ed.)

Crowley, T., & Van Steenberghen, F. (1950). Roger Bacon: The problem of the soul in his philosophical commentaries. Institut Supérieur de Philosophie [etc.].

Cita Chicago Style (17a ed.)

Crowley, Theodore, y Fernand Van Steenberghen. Roger Bacon: The Problem of the Soul in His Philosophical Commentaries. Louvain [etc.]: Institut Supérieur de Philosophie [etc.], 1950.

Cita MLA (9a ed.)

Crowley, Theodore, y Fernand Van Steenberghen. Roger Bacon: The Problem of the Soul in His Philosophical Commentaries. Institut Supérieur de Philosophie [etc.], 1950.