APA (7th ed.) Citation

Galfredus Monumetensis. (1991). The Historia regum Britannie of Geoffrey of Monmouth (1. publ.). Boydell & Brewer.

Chicago Style (17th ed.) Citation

Galfredus Monumetensis. The Historia Regum Britannie of Geoffrey of Monmouth. 1. publ. Woodbridge: Boydell & Brewer, 1991.

MLA (9th ed.) Citation

Galfredus Monumetensis. The Historia Regum Britannie of Geoffrey of Monmouth. 1. publ. Boydell & Brewer, 1991.