World Travel & Tourism Council. (1992). The 1992 Travel & Tourism Council report. WTTC.
Cita Chicago (17th ed.)World Travel & Tourism Council. The 1992 Travel & Tourism Council Report. London: WTTC, 1992.
Cita MLA (9th ed.)World Travel & Tourism Council. The 1992 Travel & Tourism Council Report. WTTC, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.