Hansen, Harry L.
Richard D. Irwin, 1956
Buku Teks SO
edited by E. Jerome McCarthy, John F. Grashof, Andrew A. Brogowicz
Richard D. Irwin, 1984
Buku Teks SO
Clark, Fred E.
Macmillan, 1931
Buku Teks
McNair, Malcolm P.
McGraw-Hill, 1949
Buku Teks SO
Westing, John Howard
Prentice-Hall, 1957
Buku Teks SO