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- Language: English
- Year: 2009
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- Language: English
- Year: 2016
- Author: Strobel Lee, Elmer Robert, Suggs Rob
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- Year: 2010
- Author: Strobel Lee
- Language: English
- Year: 2010
- Author: Stein Christina Tracy, Tracy Brian
- Language: English
- Year: 2015
- Author: Welzel Christian
- Language: English
- Year: 2013
- Author: Welzel Christian
- Language: English
- Year: 2013
- Author: Sowell Thomas
- Language: English
- Year: 2010
- Author: Seligman Martin E. P., Peterson Christopher
- Language: English
- Year: 2004