Martin, Robert J., author
Van Nostrand Reinhold, 1991
Buku Teks
Gardner, Burleigh B., author
Irwin , 1955
Buku Teks
Tregold, R.F., author
International University Press, 1950
Buku Teks
Baron, Robert A., author
Allyn and Bacon, 1991
Buku Teks
Whyte, William Foote, author
Richard D. Irwin, 1959
Buku Teks