توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

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.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

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

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

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