Morrison, Robert Thornton, author
Prentice-Hall, 1992
Buku Teks
Carey, Francis A., 1937-, author
McGraw-Hill, 1992
Buku Teks
McMurry, John, author
Brooks/Cole, 1992
Buku Teks
Hart, Harold, 1922-, author
Houghton Mifflin, 1966
Buku Teks
"Pacific Grove: Brooks/Cole Publishing Company, 1998",
Buku Teks