Franklin

MLA

Ker, N. R, and Andrew G Watson. Medieval Libraries of Great Britain : a List of Surviving Books ... Supplement to the Second Edition. London: Offices of the Royal Historical Society, 1987.

APA

Ker, N. R, & Watson, A. G. (1987). Medieval libraries of Great Britain : a list of surviving books ... supplement to the second edition. London: Offices of the Royal Historical Society.

Chicago

Ker, N. R., and Andrew G Watson. Medieval Libraries of Great Britain: A List of Surviving Books ... Supplement to the Second Edition. London: Offices of the Royal Historical Society, 1987.