20th Century Trends in Architecture ~ http://architecture.about.com/od/20thcenturytrends/20th_Century_Trends_in_Architecture.htm
Architectural Types - The Great Buildings Collection ~ http://www.greatbuildings.com/types.html
Architectural Styles Index (with timeline) ~ http://www.uwec.edu/geography/Ivogeler/w367/styles/styles.htm
House Plan Styles and Architectural Descriptions ~ http://www.theplancollection.com/house-plan-styles/
The 400-square-foot dream home ~ http://realestate.msn.com/buying/Article2.aspx?cp-documentid=1238491