du Toit, C. M. (1990). Fundamental Business Economics (Second Edition). ELSEVIER.
芝加哥风格引文du Toit, C M. Fundamental Business Economics (Second Edition). ELSEVIER, 1990.
MLA引文du Toit, C M. Fundamental Business Economics (Second Edition). ELSEVIER, 1990.
警告：这些引文格式不一定是100％准确.