APA (7 वां संस्करण) प्रशस्ति पत्र

Drew, C. H. (2000). Environmental health service in Europe 5: Guidelines for evaluation of environmental health services. WHO.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Drew, Christina H. Environmental Health Service in Europe 5: Guidelines for Evaluation of Environmental Health Services. Europe: WHO, 2000.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Drew, Christina H. Environmental Health Service in Europe 5: Guidelines for Evaluation of Environmental Health Services. WHO, 2000.