1.		Sustainable tourism development in Wales / Stephen F. Witt, Susan Gammon Autor: Witt, Stephen F Coautor: ; Gammon, Susan
2.		Incentive travel : overview and case study of Canada as a destination for the UK market / Stephen F. Witt, Susan Gammon, Jill White Autor: Witt, Stephen F Coautor: ; Gammon, Susan
3.		Sustainable tourism development in Wales : from theory to practice / R. Elwyn Owen, Stephen F. Witt, Susan Gammon Autor: Owen, R. Elwyn Coautor: ; Witt, Stephen F Gammon, Susan