APA
Group seven associates, . (1981). Tourism training: mexican needs/U.S. responses; final report. Washington-US: United States Agency for International Development.
Chicago
Group seven associates, . 1981. Tourism training: mexican needs/U.S. responses; final report. Washington-US: United States Agency for International Development.
Harvard
Group seven associates, . (1981). Tourism training: mexican needs/U.S. responses; final report. Washington-US: United States Agency for International Development.
MLA
Group seven associates, . Tourism training: mexican needs/U.S. responses; final report. Washington-US: United States Agency for International Development. 1981.