Cita APA (7a ed.)

Bisson, T. N. (1976). An "Unknown Charter" for Catalonia (A.D. 1205). [s.n.].

Cita Chicago Style (17a ed.)

Bisson, Thomas N. An "Unknown Charter" for Catalonia (A.D. 1205). [S.l.]: [s.n.], 1976.

Cita MLA (9a ed.)

Bisson, Thomas N. An "Unknown Charter" for Catalonia (A.D. 1205). [s.n.], 1976.