APA (7 वां संस्करण) प्रशस्ति पत्र
Gray, H., Parker, W., & Smith, S. (2015). State of knowledge of the use of sorption technologies for nutrient recovery from municipal wastewaters. Water Environment Research Foundation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Gray, Holly, Wayne Parker, और Scott Smith. State of Knowledge of the Use of Sorption Technologies for Nutrient Recovery from Municipal Wastewaters. Alexandria, [Virginia]: Water Environment Research Foundation, 2015.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Gray, Holly, et al. State of Knowledge of the Use of Sorption Technologies for Nutrient Recovery from Municipal Wastewaters. Water Environment Research Foundation, 2015.
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