Nicoletta, Julie
Countryman Press, 1995.
Buku Teks SO
Siegel, Larry J., 1959-, editor
West, 1983
Buku Teks
Rash, J. Keogh
John Wiley & Sons, 1979
Buku Teks
Schram, Peter J.
National Fire Protection Association,, 1993
Buku Teks
Morgan, James C.
The Free Press, 1991
Buku Teks SO