Knowles, R. (2005). 150 contractual problems and their solutions. Blackwell Pub..
芝加哥风格引文Knowles, Roger. 150 Contractual Problems and Their Solutions. Oxford ; Malden, MA: Blackwell Pub., 2005.
MLA引文Knowles, Roger. 150 Contractual Problems and Their Solutions. Blackwell Pub., 2005.
警告：这些引文格式不一定是100％准确.