Shackelford, James F., author
Macmillan Press, 1990
Buku Teks
Shackelford, James F., author
Pearson-Prentice Hall, 2005
Buku Teks
Shackelford, James F., author
Prentice Hall International, 1996
Buku Teks
Van Vlack, Lawrence H., author
Addison-Wesley, 1970
Buku Teks
Ahmed, Ash, author
Routledge, 2015
Buku Teks