Werz, E. W. (1993). The complete customer service letter book. McGraw-Hill.
Chicagoスタイル(17版)引用形式Werz, Edward W. The Complete Customer Service Letter Book. New York: McGraw-Hill, 1993.
MLA(9版)引用形式Werz, Edward W. The Complete Customer Service Letter Book. McGraw-Hill, 1993.
警告: この引用は必ずしも正確ではありません.