Tull, D. S. &. H. D. I. (1960). Marketing Research: Measurment & Method (6.). PHI.
芝加哥风格引文Tull, Donald S & Hawkins Del I. Marketing Research: Measurment & Method. 6. New delhi: PHI, 1960.
MLA引文Tull, Donald S & Hawkins Del I. Marketing Research: Measurment & Method. 6. PHI, 1960.
警告：这些引文格式不一定是100％准确.