Rosenberg, Vivian M., author
Random House, 1989
Buku Teks
John Hartley [and others]
Rinehart and Winston, 1962
Buku Teks
Scharbach, Alexander, author
McGraw-Hill , 1965
Buku Teks
McGraw-Hill, 1990
Buku Teks
Henshaw, Marjorie, author
Little, Brown, 1962
Buku Teks