APA引文

Tyagi, S. (2010). From gray to green: New thoughts on environment.

Chicago Edition Citation

Tyagi, Sanjiv. From Gray to Green: New Thoughts on Environment. Excel Books, New Delhi, 2010.

MLA引文

Tyagi, Sanjiv. From Gray to Green: New Thoughts on Environment. 2010.

警告：這些引文格式不一定是100％准確.