Duggal, K. N. (2002). Elements of environmental engineering (6th ed.). S. Chand.
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Chicago Style (17th ed.) Citation
Duggal, K. N. Elements of Environmental Engineering. 6th ed. New Delhi: S. Chand, 2002.
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MLA引文
Duggal, K. N. Elements of Environmental Engineering. 6th ed. S. Chand, 2002.
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警告：這些引文格式不一定是100％准確.