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引文De Souto, Martha Sarbey. Group Travel Operations Manual. Delamr Pub, 1985.
警告:這些引文格式不一定是100%准確.