MIKULAK RAYMOND J. (1991). FIRST CLASS SERVICE: WORKBOOK 1. QUALITY RESOURCES.
芝加哥风格引文MIKULAK RAYMOND J. FIRST CLASS SERVICE: WORKBOOK 1. NEW YORK: QUALITY RESOURCES, 1991.
MLA引文MIKULAK RAYMOND J. FIRST CLASS SERVICE: WORKBOOK 1. QUALITY RESOURCES, 1991.
警告：这些引文格式不一定是100％准确.