APA ציטוט
Duggal, K. N. (2002). Elements of environmental engineering (6th ed.). S. Chand.
Chicago Style (17th ed.) Citation
Duggal, K. N. Elements of Environmental Engineering. 6th ed. New Delhi: S. Chand, 2002.
ציטוט MLA
Duggal, K. N. Elements of Environmental Engineering. 6th ed. S. Chand, 2002.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.