MLA

Great Britain (1625-1649 : Charles I). Die Sabbathi, 3 Augusti, 1644 : an ordinance declaratory, of the Lords and Commons assembled in Parliament for the regulating of the excise, upon flesh, viz. beeves, muttons, veals, porks, lambs .... 1644. https://collections.library.yale.edu/catalog/2026529.

APA, 6th edition

Great Britain (1625-1649 : Charles I). (1644)[Die Sabbathi, 3 Augusti, 1644 : an ordinance declaratory, of the Lords and Commons assembled in Parliament for the regulating of the excise, upon flesh, viz. beeves, muttons, veals, porks, lambs ...]. https://collections.library.yale.edu/catalog/2026529.