APA (7th ed.) Citation

British Library, Robert, o. G., & Black, W. H. The Life and martyrdom of Thomas Beket: Archbishop of Canterbury.

Chicago Style (17th ed.) Citation

British Library, of Gloucester Robert, and William Henry Black. The Life and Martyrdom of Thomas Beket: Archbishop of Canterbury.

MLA (9th ed.) Citation

British Library, et al. The Life and Martyrdom of Thomas Beket: Archbishop of Canterbury.