Automated Surface Observing System :
ASOS User's Guide.

APA Citation

United States. Navy., United States. Federal Aviation Administration., United States. National Oceanic and Atmospheric Administration. (1998). Automated Surface Observing System: ASOS User's Guide. [Washington, D.C.?: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration .

MLA Citation

United States. Navy, United States. Federal Aviation Administration, and United States. National Oceanic and Atmospheric Administration. Automated Surface Observing System: ASOS User's Guide. [Washington, D.C.?: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration , 1998.