Thornton, G. C.
Butterworth, 1987
Buku Teks
Kenneth A. Adams, author
United States of America, 2008
Buku Teks
Traister, John E.
Reston Publishing , 1979
Buku Teks
Carmody, Emmett J.
Oklahoma: CAD Press, c1989
Buku Teks
Hartman, William
McGraw-HIll, 1981
Buku Teks