APA (7 वां संस्करण) प्रशस्ति पत्र
Gu, A. Z. (2014). Phosphorus fractionation and removal in wastewater treatment--implications for minimizing effluent phosphorus. IWA Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Gu, April Z. Phosphorus Fractionation and Removal in Wastewater Treatment--implications for Minimizing Effluent Phosphorus. London, England: IWA Publishing, 2014.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Gu, April Z. Phosphorus Fractionation and Removal in Wastewater Treatment--implications for Minimizing Effluent Phosphorus. IWA Publishing, 2014.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.