Foster, Dennis L.
Sales and marketing for the travel professional / Dennis L. Foster
Glencoe , 1993
Buku Teks
Foster, Dennis L.
Sales and marketing for the travel profesional / Dennis L. Foster, penerjemah Tri Budhi Sastrio
RajaGrafindo Persada, 2000
Buku Teks
Foster, Dennis L.
Rooms at the Inn : front office operations and administration/ Foster Dennis L.,
McGraw-Hill, 1992
Buku Teks SO
Foster, Douglas
Travel and tourism management / Douglas Foster
Macmillan, 1985
Buku Teks
Anderson, Rolph E.
Professional sales management
McGraw-Hill, 1992
Buku Teks SO