Forsyth, Frederick, 1938-, author
Serambi Ilmu Semesta, 2013
Buku Teks
Barber, Noel
Wevbright and Tallev, 1971
Buku Teks
Sage, Lorna, author
Macmillan, 1992
Buku Teks
Katzenbach, Jon R., author
Ballantine Books, 2002
Buku Teks
Peterson, Michael, author
Pocket Star Books, 1990
Buku Teks