Singh, Surendra
Vikas, 1979
Buku Teks
Van Vlack, Lawrence H.
Addison-Wesley, 1982
Buku Teks
Timings, Roger Leslie, 1927-
Longman Scientific, 1989
Buku Teks
Timings, Roger Leslie, 1927-
Longman, 1991
Buku Teks
Van Vlack, Lawrence H.
Addison-Wesley, 1980
Buku Teks