National District Heating Association. Official proceedings, Annual meeting of the National District Heating Association. National District Heating Association.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNational District Heating Association. Official Proceedings, Annual Meeting of the National District Heating Association. Pittsburgh, Pa.: National District Heating Association.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNational District Heating Association. Official Proceedings, Annual Meeting of the National District Heating Association. National District Heating Association.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.