Coffmann, C. Dewitt
The Educational Institute of the American Hotel Motel Association, 1980
Buku Teks
Angelo, Rocco M.,
Educational Institute, 1998
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Hsu, Cathy H.C.,, author
John Wiley & Sons, 2001
Buku Teks
McDonough, Brian, author
Wiley, 2001
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Kotler, Philip, author
Pearson Education, 2014
Buku Teks