Dustin, Daniel K. “Wall Drug, South Dakota: An Original Tourist Trap.”
Parks and Recreation 36 (September 2001), 104-109.
Duffy, John M. “Dakota Images: Theodore E. Hustead and Dorothy Rush Hustead.”
South Dakota History 33 (Summer 2003).
Hanna, Julia. “American Dream.” Harvard Business School Alumni Bulletin (September 2004).
[http://www.alumni.hbs.edu/bulletin/2004/september/profile_hustead.html] Retrieved 31 January 2006
Jennings, Dana Close. Free Ice Water: The Story of Wall Drug.
Aberdeen, South Dakota: Northern Plains Press, 1969.
Wall Drug Store, Wall, South Dakota, pamphlets.
University of South Dakota I.D. Week Library Chilson Collection HF6201 .W35x.
http://www.walldrug.com/. Retrieved 24 January 2006.
http://en.wikipedia.org/wiki/Wall_Drug. Retrieved 24 January 2006
