Gluck, Peter L.
Rockport Publishers, 1997
Buku Teks
Crosbie, Michael J.
Rockport Pub., 1998
Buku Teks
Browne, Enrique
Rockport Publishers, 1997
Buku Teks
Moura, Eduardo Souto
Rockport Publishers, 1998
Buku Teks
Prati, Lacroze Miguens
Rockport Pub., 1997
Buku Teks