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.
Chicago-Zitierstil (17. Ausg.)Sri Lanka. Ministry of Environment and Parliamentary Affairs und Sri Lanka. Madhyama Parisara Adhikāriya. Sobā: Environmental Publication. Colombo: Ministry of Environment and Parliamentary Affairs : Central Environmental Authority, 1990.
MLA-Zitierstil (8. Ausg.)Sri Lanka. Ministry of Environment and Parliamentary Affairs und Sri Lanka. Madhyama Parisara Adhikāriya. Sobā: Environmental Publication. Ministry of Environment and Parliamentary Affairs : Central Environmental Authority, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.