Walker, E. A.
The University Press, 1945
Buku Teks
Ding, Julian
Swett and Maxwell Asia, 1999
Buku Teks
Khan, Badrul H, author
Information Science Publishing, 2005
Buku Teks
Dougall, Herbert E.
Prentice-Hall, 1973
Buku Teks
Dougall, Herbert E.
Prentice-Hall, 1968
Buku Teks