Foster, Dennis L.
Sales and marketing for the travel professional / Dennis L. Foster
Glencoe, 1993
 Buku Teks SO
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
Middleton, Victor T.C.
Marketing in travel and tourism
Butterworth-Heinemann, 2000
 Buku Teks