Dawe, Charles W.
Little, Brown and Company, c1984
Buku Teks
Scharton, Maurice
Allyn and Bacon, 1993
Buku Teks
Flower, Linda, author
Hancourt Brace Jovanovich, 1981
Buku Teks
Arapoff, Nancy
Holt, Rinehart and Winston, 1970
Buku Teks
McCrimmon, James M.
Houghton Miffiln, 1963
Buku Teks