- Author: John M. Walker
- Language: English
- Year: 2002
- Author: Lawrence R. Walker Roger del Moral
- Language: English
- Year: 2003
- Author: M. Kreis J. H. Walker
- Language: English
- Year: 2000
- Author: Jon Mathews Robert L. Walker
- Language: English
- Year: 1971
Games That Sell!
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- Author: Mark Walker
- Language: English
- Year: 2003
- Author: Elaine Walker Steve Elsworth
- Language: English
- Year: 2000
- Author: C. H. Walker
- Language: English
- Year: 2008
- Author: Pam Walker Elaine Wood
- Language: English
- Year: 2004
- Author: Gayle Corkill Ralph Rapley (auth.) John M. Walker Ralph Rapley (eds.)
- Language: English
- Year: 2008
- Author: J.M. Walker R. Rapley
- Language: English
- Year: 2000