APA (7th ed.) Citation

Kenyon, J. R. (1990). Medieval fortifications (1. publ.). Leicester Univ. Pr.

Chicago Style (17th ed.) Citation

Kenyon, John R. Medieval Fortifications. 1. publ. Leicester u.a: Leicester Univ. Pr, 1990.

MLA (9th ed.) Citation

Kenyon, John R. Medieval Fortifications. 1. publ. Leicester Univ. Pr, 1990.

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