APA (7th ed.) Citation

Summerson, J. N. (1970). Gregorian London. Barrie & Jenkins.

Chicago Style (17th ed.) Citation

Summerson, John Newenham. Gregorian London. [London]: Barrie & Jenkins, 1970.

MLA (9th ed.) Citation

Summerson, John Newenham. Gregorian London. Barrie & Jenkins, 1970.

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