Salvato, J. A., & Beck, J. E. (1994). Environmental engineering and sanitation 1994 supplement: New tools for the environmental engineer/specialist. Wiley.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSalvato, Joseph A., और Joe E. Beck. Environmental Engineering and Sanitation 1994 Supplement: New Tools for the Environmental Engineer/specialist. New York: Wiley, 1994.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSalvato, Joseph A., और Joe E. Beck. Environmental Engineering and Sanitation 1994 Supplement: New Tools for the Environmental Engineer/specialist. Wiley, 1994.
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