BAER EARL E. (1981). MARKETING SYSTEM PROCESS CASES AND PROBLEMS. GOODYEAR.
芝加哥风格引文BAER EARL E. MARKETING SYSTEM PROCESS CASES AND PROBLEMS. CALIFORNIA: GOODYEAR, 1981.
MLA引文BAER EARL E. MARKETING SYSTEM PROCESS CASES AND PROBLEMS. GOODYEAR, 1981.
警告：这些引文格式不一定是100％准确.