APA (7th ed.) Citation

Harvey, P. D. A. (1991). Medieval maps / P. D. A. Harvey. British Library.

Chicago Style (17th ed.) Citation

Harvey, P. D. A. Medieval Maps / P. D. A. Harvey. London: British Library, 1991.

MLA (9th ed.) Citation

Harvey, P. D. A. Medieval Maps / P. D. A. Harvey. British Library, 1991.

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