Singh Avtar. (1999). Introduction to law of Contract (3.). Eastern Book company.
芝加哥风格引文Singh Avtar. Introduction to Law of Contract. 3. Lucknow: Eastern Book company, 1999.
MLA引文Singh Avtar. Introduction to Law of Contract. 3. Eastern Book company, 1999.
警告：这些引文格式不一定是100％准确.