Harold L. Vogel. (2012). Travel Industry Economics (2.). Cambridge University Press.
Cita Chicago (17th ed.)Harold L. Vogel. Travel Industry Economics. 2. Cambridge University Press, 2012.
Cita MLA (8th ed.)Harold L. Vogel. Travel Industry Economics. 2. Cambridge University Press, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.