Heng, H. T. T. (1991). The rice trade in Singapore.
Chicago Style (17th ed.) CitationHeng, Helen Tai Tze. The Rice Trade in Singapore. 1991.
MLA引文Heng, Helen Tai Tze. The Rice Trade in Singapore. 1991.
警告：這些引文格式不一定是100％准確.
APA引文