APA
Ministry of Environment and Parliamentary Affairs S. L., . (1991). Sri Lanka National Report to the United Nations Conference on Environment and Development. : Ministry of Environment and Parliamentary Affairs, Sri Lanka.
Chicago
Ministry of Environment and Parliamentary Affairs Sri Lanka, . 1991. Sri Lanka National Report to the United Nations Conference on Environment and Development. : Ministry of Environment and Parliamentary Affairs, Sri Lanka.
Harvard
Ministry of Environment and Parliamentary Affairs S. L., . (1991). Sri Lanka National Report to the United Nations Conference on Environment and Development. : Ministry of Environment and Parliamentary Affairs, Sri Lanka.
MLA
Ministry of Environment and Parliamentary Affairs Sri Lanka, . Sri Lanka National Report to the United Nations Conference on Environment and Development. : Ministry of Environment and Parliamentary Affairs, Sri Lanka. 1991.