Hughes, Paul L., author
Littlefield, Adams, 1956
Buku Teks
Houghton Mifflin, 1985
Buku Teks
Major, J. Russel, author
J.B. Lippincott, 1966
Buku Teks
Naidis, Mark, author
Dryden Press, 1972
Buku Teks
Viorst, Milton, author
Chilton Book Company, 1967
Buku Teks