Morales, Armando, author
Allyn and Bacon, 1977
Buku Teks
L`Engle, Madeleine
Dell Publishing, 1973
Buku Teks
Gilchrist, Ellen, author
Little, Brown & Co., 2000
Buku Teks
Christenson, Reo M.
Harper & Row Publishers, 1982
Buku Teks
Lauer, Robert H., author
McGraw-Hill, 2014
Buku Teks