Sharma, D., & Chhabra, B. S. (2007). Environmental studies (as per syllabus of HP University). New Age International (P) Ltd., Publishers.
芝加哥风格引文Sharma, Deepa, 与 Bhupendra Singh Chhabra. Environmental Studies (as Per Syllabus of HP University). New Delhi: New Age International (P) Ltd., Publishers, 2007.
MLA引文Sharma, Deepa, 与 Bhupendra Singh Chhabra. Environmental Studies (as Per Syllabus of HP University). New Age International (P) Ltd., Publishers, 2007.
警告：这些引文格式不一定是100％准确.