APA (7th ed.) Citation

Ker, N. R. (1941). Medieval libraries of Great Britain : a list of surviving books / by N.R. Ker: A list of surviving books. Royal Historical Society.

Chicago Style (17th ed.) Citation

Ker, N. R. Medieval Libraries of Great Britain : A List of Surviving Books / by N.R. Ker: A List of Surviving Books. Royal Historical Society, 1941.

MLA (9th ed.) Citation

Ker, N. R. Medieval Libraries of Great Britain : A List of Surviving Books / by N.R. Ker: A List of Surviving Books. Royal Historical Society, 1941.

Warning: These citations may not always be 100% accurate.