Barlow Rogers, E. (2001). Landscape Design: A Cultural and Architectural History. New York: Abrams
Chisholm, L.A. (2018). The History of Landscape Design in 100 Gardens. Portland: Timber Press, Inc.
Jellicoe, G., Jellicoe, S. (1995). The Landscape of Man (3rd ed.) London: Thames & Hudson.
Taylor, P. (Ed.) (2006). The Oxford Companion to the Garden. Oxford: Oxford University Press.
Online References (a place to start)
This is a partial list, but I have found the following sources most helpful. Note: Do not rely on Wikipedia for your information. Wikipedia is too general, can have errors, and is not geared toward our study.