Cita APA (7a ed.)

Great Britain. Public Record Office. (1968). Guide to seals in the Public Record Office. H.M.S.O..

Cita Chicago Style (17a ed.)

Great Britain. Public Record Office. Guide to Seals in the Public Record Office. London: H.M.S.O., 1968.

Cita MLA (8a ed.)

Great Britain. Public Record Office. Guide to Seals in the Public Record Office. H.M.S.O., 1968.