Viorst, Milton
Chilton Books, 1965
Buku Teks
Hughes, Paul L.
Littlefield, Adams, 1956
Buku Teks
Naidis, Mark
Dryden Press, 1972
Buku Teks
edited, Daniel D. Mcgarry, Clarence L. Hohl
Houghton Miffiln, 1963
Buku Teks
Weber, Eugen
D.C. Heath, 1959
Buku Teks