Rumekso, author
ANDI, 2005
Buku Teks
Bardi, James A., author
John Wiley & Sons, 2007
Buku Teks
Wildermuth, J.R., author
Ecole Hotellere, 1978
Buku Teks
Wildermuth, J.R., author
Ecole Hotellere, 1980
Buku Teks
Indro Yuwono, author
Universitas Indonesia, 1995
UI - Tesis (Membership)