Cita APA (7th ed.)

National Fire Protection Association. (2020). NFPA 2: Hydrogen technologies code 2020 (2020 edition.). National Fire Protection Association.

Cita Chicago (17th ed.)

National Fire Protection Association. NFPA 2: Hydrogen Technologies Code 2020. 2020 edition. Quincy, Mass., United States: National Fire Protection Association, 2020.

Cita MLA (9th ed.)

National Fire Protection Association. NFPA 2: Hydrogen Technologies Code 2020. 2020 edition. National Fire Protection Association, 2020.