APA (7 वां संस्करण) प्रशस्ति पत्र
Sivakumar, R., & Fegan, S. C. (2005). Introduction to environmental science and engineering (4th ed.). Vijay Nicole Imprints.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Sivakumar, Raman, और Sophia Chung Fegan. Introduction to Environmental Science and Engineering. 4th ed. Chennai: Vijay Nicole Imprints, 2005.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Sivakumar, Raman, और Sophia Chung Fegan. Introduction to Environmental Science and Engineering. 4th ed. Vijay Nicole Imprints, 2005.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.