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.
Cytowanie według stylu Chicago (wyd. 17)Sri Lanka. Ministry of Environment and Parliamentary Affairs i Sri Lanka. Madhyama Parisara Adhikāriya. Sobā: Environmental Publication. Colombo: Ministry of Environment and Parliamentary Affairs : Central Environmental Authority, 1990.
Cytowanie według stylu MLA (wyd. 8)Sri Lanka. Ministry of Environment and Parliamentary Affairs i Sri Lanka. Madhyama Parisara Adhikāriya. Sobā: Environmental Publication. Ministry of Environment and Parliamentary Affairs : Central Environmental Authority, 1990.
Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..