- Author: Mark Twain John Seelye Justin Kaplan
- Language: English
- Year: 2009
- Author: Linda Kaplan Thaler Robin Koval
- Language: English
- Year: 2009
- Author: Robert M. Kaplan Dennis P. Saccuzzo
- Language: English
- Year: 2004
- Author: Robert Kaplan Ellen Kaplan
- Language: English
- Year: 2011
- Author: Mehmet Kaplan
- Language: Turkish
- Author: A. Barry Kay Allen P. Kaplan Jean Bousquet Patrick G. Holt
- Language: English
- Year: 2008
- Author: Cynthia G. Kaplan
- Language: English
- Year: 2007
- Author: Wilfred Kaplan
- Language: English
- Year: 2002
- Author: Robert B. Kaplan Richard B. Baldauf
- Language: English
- Year: 1999
- Author: Richard B. Baldauf Robert B. Kaplan
- Language: English
- Year: 2000