McCrimmon, James W., author
Houghton Mifflin, 1984
Buku Teks
Booth, Wayne C., author
Harper & Row, 1987
Buku Teks
Flower, Linda, author
Hancourt Brace Jovanovich, 1981
Buku Teks
Bailey, Edward P., author
Charles E. Merrill, 1984
Buku Teks
McCrimmon, James M.
Houghton Miffiln, 1963
Buku Teks