Παραπομπή σε μορφή APA (7η εκδ.)

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.

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (8th εκδ.)

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