De Souto, M. S. (1985). Group travel operations manual. Delamr Pub.
Chicago Style (17th ed.) CitationDe Souto, Martha Sarbey. Group Travel Operations Manual. Albany, N.Y: Delamr Pub, 1985.
MLA citiranjeDe Souto, Martha Sarbey. Group Travel Operations Manual. Delamr Pub, 1985.
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