Marasinghe, Lakshman
Butterworth Asia, 1998
Buku Teks
Horn, Paul V., author
Prentice-Hall, 1959
Buku Teks
Horn, Paul V., author
Prentice-Hall, 1955
Buku Teks
Horn, Paul V., author
Prentice-Hall, 1959
Buku Teks
Houtte, Hans Van, author
Sweet & Maxewell, 1995
Buku Referensi