Barry, Tom
Grove Weidenfeld, 1991
Buku Teks
Booth, John A., author
Westerview Press, 1993
Buku Teks
Booth, John A., author
Westerview Press, 1989
Buku Teks
Liss, Sheldon B.
Westview Press, 1991
Buku Teks
Tacsan, Joaquin, author
Martinus Nijhoff, 1992
Buku Teks