APA (7th ed.) Citation

(1999). Gas in the CIS and Europe (1999 ed.). Petroleum Economist u.a.

Chicago Style (17th ed.) Citation

Gas in the CIS and Europe. 1999 ed. London: Petroleum Economist u.a, 1999.

MLA (9th ed.) Citation

Gas in the CIS and Europe. 1999 ed. Petroleum Economist u.a, 1999.