Sperling. JoAnn. (1969). Job descriptions in marketing management. AMA, Inc.
芝加哥风格引文Sperling. JoAnn. Job Descriptions in Marketing Management. New York: AMA, Inc, 1969.
MLA引文Sperling. JoAnn. Job Descriptions in Marketing Management. AMA, Inc, 1969.
警告：这些引文格式不一定是100％准确.