Timings, R.L. (Roger Leslie), 1927-, author
Longman, 1991
Buku Teks
Shackelford, James F., author
Macmillan Press, 1990
Buku Teks
Van Vlack, Lawrence H., author
Addison-Wesley, 1980
Buku Teks
Smith, William F., author
McGraw-HIll Higher education, 2006
Buku Teks
Smith, William F., author
McGraw-Hill, 2004
Buku Teks