APA (7 वां संस्करण) प्रशस्ति पत्र
Schnapf, L. P. (2003). State enforcement actions dwarf EPA activity. Environmental Law Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Schnapf, Lawrence P. State Enforcement Actions Dwarf EPA Activity. Washington, D.C.: Environmental Law Institute, 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Schnapf, Lawrence P. State Enforcement Actions Dwarf EPA Activity. Environmental Law Institute, 2003.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.