Cita APA

Parker, J. 1., & Duffy, J. (1979). The Synodicon Vetus. Washington, D.C: Dumbarton Oaks [etc.].

Citación estilo Chicago

Parker, John 1926-, and John Duffy. The Synodicon Vetus. Washington, D.C: Dumbarton Oaks [etc.], 1979.

Cita MLA

Parker, John 1926-, and John Duffy. The Synodicon Vetus. Washington, D.C: Dumbarton Oaks [etc.], 1979.