APA引文

Heng, R. W. K. (2009). Variation orders in design and build contracts.

Chicago Style (17th ed.) Citation

Heng, Robert Wei Kiong. Variation Orders in Design and Build Contracts. 2009.

MLA引文

Heng, Robert Wei Kiong. Variation Orders in Design and Build Contracts. 2009.

警告：这些引文格式不一定是100％准确.