Vibal, Victor R. Principles of tourism / - Pasig City: Anvil Pub., Inc., c2010. - xiii, 117 p. : ill.; 25 cm. Includes bibliographical references. ISBN: 9789712723636 Subjects--Topical Terms: 1. Tourist trade. 2. Travel. Dewey Class. No.: Fil. 338.4 V624p 2010