Autor: William Heward, 14 titluri

John Cooper,Timothy Heron,William Heward

William Howard Armstrong

Mihaly Csikszentmihalyi,Howard Gardner,William Damon

Howard Gardner,Mihaly Csikszentmihalyi,William Damon

Nathalie H. Jenkins,William C. Bailey,Scott M. Stanley,Howard J. Markman

Deirdre Howard Williams

James Taylor,Ken Wilson,Michael Vince,Deirdre Howard Williams,Mary Tomalin

James Taylor,Ken Wilson,Michael Vince,Deirdre Howard Williams,Mary Tomalin