APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (8. p.)

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

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