National Fire Protection Association. (2020). NFPA 2: Hydrogen technologies code 2020 (2020 edition.). National Fire Protection Association.
Chicago Style (17th ed.) CitationNational Fire Protection Association. NFPA 2: Hydrogen Technologies Code 2020. 2020 edition. Quincy, Mass., United States: National Fire Protection Association, 2020.
ציטוט MLANational Fire Protection Association. NFPA 2: Hydrogen Technologies Code 2020. 2020 edition. National Fire Protection Association, 2020.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.