DUGGER, J. (1992). Business Letter For Busy People Jim Dugger. Golden Books Centre.
Chicago Style (17th ed.) CitationDUGGER, Jim. Business Letter For Busy People Jim Dugger. Golden Books Centre, 1992.
MLA引文DUGGER, Jim. Business Letter For Busy People Jim Dugger. Golden Books Centre, 1992.
警告：這些引文格式不一定是100％准確.