Stevens, Roger T., author
M&T, 1988
Buku Teks
Angell, Ian O., author
Macmillan, 1991
Buku Teks
Tyler, Andrew, author
SIGMA Press, 1994
Buku Referensi
Watkins, Christopher, author
M&T, 1992
Buku Teks
Weiskamp, Keith, author
John Wiley & Sons, 1989
Buku Teks