O`Sullivan, Terence, author
Macmillan, 1999
Buku Teks
Cooper, Joseph D., author
Doubleday, 1961
Buku Teks
Olson, Charles L., author
Scott, Foresman, 1983
Buku Teks
Ibnu Syamsi, author
Bina Aksara, 1989
Buku Teks
Maple, Frank F., author
Sage, 1989
Buku Teks