Cita APA

American National Standards Institute, American National Standards Institute, National Fire Protection Association (Estados Unidos), & National Fire Protection Association (Estados Unidos). (2008). Standard for the installation of air-conditioning and ventilating systems: NFPA 90A (2009 edition.). Quincy, Mass.: National Fire Protection Association.

Citación estilo Chicago

American National Standards Institute, American National Standards Institute, National Fire Protection Association (Estados Unidos), y National Fire Protection Association (Estados Unidos). Standard for the Installation of Air-conditioning and Ventilating Systems: NFPA 90A. 2009 edition. Quincy, Mass.: National Fire Protection Association, 2008.

Cita MLA

American National Standards Institute, American National Standards Institute, National Fire Protection Association (Estados Unidos), y National Fire Protection Association (Estados Unidos). Standard for the Installation of Air-conditioning and Ventilating Systems: NFPA 90A. 2009 edition. Quincy, Mass.: National Fire Protection Association, 2008.