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