51.		Une civilisation des loisirs / Georges Hourdin Autor: Hourdin, Georges Data Publicação: (cop.) 1961
52.		An examination of park preferences and behaviors among urban residents: the role of residential location, race and age / Laura L. Payne, Andrew J. Mowen, Elizabeth Orsega-Smith Autor: Payne, Laura L. Coautor: ; Mowen, Andrew J. Orsega-Smith, Elizabeth
53.		Psychology and tourism / Philip L. Pearce, Peter F. Stringer Autor: Pearce, Philip L. Coautor: ; Stringer, Peter F.