Cita APA (7a ed.)
O'Brien, G. (2001). An Essay on mediæval economic teaching. Batoche.
Cita Chicago Style (17a ed.)
O'Brien, George. An Essay on Mediæval Economic Teaching. Kitchener, Ont.: Batoche, 2001.
Cita MLA (9a ed.)
O'Brien, George. An Essay on Mediæval Economic Teaching. Batoche, 2001.
Precaución: Estas citas no son 100% exactas.