APA (7 ম সংস্করণ) উদ্ধৃতি

Vassilakos, N. P. (1998). Energy-efficient industrial natural gas technologies and equipment. Office for Official Publications of the European Communities.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Vassilakos, Nicholas P. Energy-efficient Industrial Natural Gas Technologies and Equipment. Luxembourg: Office for Official Publications of the European Communities, 1998.

M.L.A (8 ম সংস্করণ) উদ্ধৃতি

Vassilakos, Nicholas P. Energy-efficient Industrial Natural Gas Technologies and Equipment. Office for Official Publications of the European Communities, 1998.