APA (7 ম সংস্করণ) উদ্ধৃতি

United Nations Economic Commission for Europe. (1979). The Gas Situation in the ECE Region Around the Year 1990. ELSEVIER.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

United Nations Economic Commission for Europe. The Gas Situation in the ECE Region Around the Year 1990. ELSEVIER, 1979.

M.L.A (8 ম সংস্করণ) উদ্ধৃতি

United Nations Economic Commission for Europe. The Gas Situation in the ECE Region Around the Year 1990. ELSEVIER, 1979.