Grady, C. P. L. (1999). Biological wastewater treatmentC. P. Leslie Grady, Glen T. Daigger, Henry C. Lim (Inf.Harga Per/8/05 Rp 2.437.500,-Djakarta R). Marcel Dekker.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGrady, C. P. Leslie. Biological Wastewater TreatmentC. P. Leslie Grady, Glen T. Daigger, Henry C. Lim (Inf.Harga Per/8/05 Rp 2.437.500,-Djakarta R). Marcel Dekker, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGrady, C. P. Leslie. Biological Wastewater TreatmentC. P. Leslie Grady, Glen T. Daigger, Henry C. Lim (Inf.Harga Per/8/05 Rp 2.437.500,-Djakarta R). Marcel Dekker, 1999.
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