Cita APA (7a ed.)

Orpen, G. H., & Duffy, S. (2019). Ireland under the Normans: 1169-1333. Four Court Press.

Cita Chicago Style (17a ed.)

Orpen, Goddard Henry, y Seán Duffy. Ireland Under the Normans: 1169-1333. Dublin: Four Court Press, 2019.

Cita MLA (9a ed.)

Orpen, Goddard Henry, y Seán Duffy. Ireland Under the Normans: 1169-1333. Four Court Press, 2019.