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