New York: Greenwood Publishing, 2000.

Greenwood Publishing, 1996.

Greenwood Publishing, 2007, 222 pages.

First issued in 1958, it remains in print, published by Greenwood Publishing.

Greenwood Publishing, 2001.

Greenwood Publishing, 1997.

Greenwood Publishing, 2006.

Greenwood Publishing, 2005.

Robert C. Harding, The History of Panama, Greenwood Publishing, 2006.

Greenwood Publishing, 2003.