Rerum Britannicarum Medii Ævi scriptores;
or, Chronicles and memorials of Great Britain and Ireland during the Middle Ages.

APA Citation

Great Britain. Public Record Office. (1965). Rerum Britannicarum Medii Ævi scriptores: or, Chronicles and memorials of Great Britain and Ireland during the Middle Ages. [New York]: Kraus Reprint.

MLA Citation

Great Britain. Public Record Office. Rerum Britannicarum Medii Ævi Scriptores: Or, Chronicles And Memorials of Great Britain And Ireland During the Middle Ages. [New York]: Kraus Reprint, 1965.

Warning: These citations may not always be complete (especially for serials).