Παραπομπή σε μορφή APA (7η εκδ.)

FOSTER, D. (1993). Sales And Marketing For The Travel Professional Dennis L.foster. McGraw-Hill.

Παραπομπή σε μορφή Chicago (17η εκδ.)

FOSTER, Dennis. Sales And Marketing For The Travel Professional Dennis L.foster. McGraw-Hill, 1993.

Παραπομπή σε μορφή MLA (8th εκδ.)

FOSTER, Dennis. Sales And Marketing For The Travel Professional Dennis L.foster. McGraw-Hill, 1993.