Katzan, Harry, Jr.
Operating system: a pragmatic approach
Van Nostrand Reinhold, 1973
 Buku Teks SO
Comer, Douglas
Operating system design : the xinu approach
Prentice-Hall, 1984
 Buku Teks
Kreitzberg, Charles B.
FORTRAN programming, a spiral approach : compatible with WATFOR/WATFIV and FORTRAN 77
Harcourt Brace Javanovich, 1982
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Comer, Douglas
Operating system design volume I : the xinu approach
Prentice-Hall, 1988
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Camara, Dom Helder
Spiral kekerasan
Insist Press, 2000
 Buku Teks