Principles and ethics of tour guiding 
Cruz, Zenaida Lansangan. 
 - Updated edition. 
 -  Rex Book Store :  2008 
 - vii, 164 pages 
978-9-71235100-6
Tour guides (persons) -- Handbooks, manuals, etc.
F 338.4791 C955 2008
                        978-9-71235100-6
Tour guides (persons) -- Handbooks, manuals, etc.
F 338.4791 C955 2008