Emergency Airfield Lighting System (EALS).
APA Citation
United States. Dept. of the Air Force. (1999). Emergency Airfield Lighting System (EALS). [Washington, D.C.?]: Dept. of the Air Force.
MLA Citation
United States. Dept. of the Air Force. Emergency Airfield Lighting System (EALS). [Washington, D.C.?]: Dept. of the Air Force, 1999.
Warning: These citations may not always be complete (especially for serials).