Morrison, Robert Thornton
Allyn and Bacon, 1973
Buku Teks SO
Morrison, Robert Thornton
Prentice-Hall, 1992
Buku Teks SO
Neckers, Douglas C.
John Wiley & Sons, 1977
Buku Teks SO
Fessenden, Ralph J.
Willard Grant Press, 1979
Buku Teks SO
McMurry, John
Brooks/Cole, 2007
Buku Teks SO