Zaks, Rodnay, author
Sybex, 1984
Buku Teks
Dixey, Graham, author
Stanley Thornes, 1991
Buku Teks
Carr, Joseph J., author
Reston Publishing, 1982
Buku Teks
Bolton, W. (William), 1933-, author
Longman , 2000
Buku Teks
Lenk, John D., author
Newnes, 1998
Buku Teks