Franklin

MLA

Walker, Derek, Edmund Happold, and William Addis. Happold : the Confidence to Build. Great Britain: Happold Trust Publications, 1997.

APA

Walker, D., Happold, E., & Addis, W. (1997). Happold : the confidence to build. Great Britain: Happold Trust Publications.

Chicago

Walker, Derek, Edmund Happold, and William Addis. Happold: The Confidence to Build. Great Britain: Happold Trust Publications, 1997.