Managing ecotourism: an opportunity spectrum approach / Stephen W. Boyd, Richard W. Butler
Heritage tourism in the 21 st century: valued traditions and the new perespectives / Dallen J. Timothy, Stephen W. Boyd
Tourism and Trails : Cultural, Ecological and Management Issues / Dallen J. Timothy
Low versus high intensity approaches to interpretive tourism planning: the case of the Cliffs of Moher, Ireland / Noel Healy, Carena J. Van Riper and Stephen W. Boyd