APA (7 वां संस्करण) प्रशस्ति पत्र

Sri Lanka. Ministry of Environment and Parliamentary Affairs & Sri Lanka. Madhyama Parisara Adhikāriya. (1990). Sobā: Environmental publication. Ministry of Environment and Parliamentary Affairs : Central Environmental Authority.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Sri Lanka. Ministry of Environment and Parliamentary Affairs और Sri Lanka. Madhyama Parisara Adhikāriya. Sobā: Environmental Publication. Colombo: Ministry of Environment and Parliamentary Affairs : Central Environmental Authority, 1990.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Sri Lanka. Ministry of Environment and Parliamentary Affairs और Sri Lanka. Madhyama Parisara Adhikāriya. Sobā: Environmental Publication. Ministry of Environment and Parliamentary Affairs : Central Environmental Authority, 1990.