Oxford University Press, 1951
Buku Teks
by Ira E. Aaron ... [and others]
Scott, Foresman and Company, 1983
Buku Teks
Stanchfield, Jo M., author
Houghton Miffiln, 1979
Buku Teks
Whitney, Norman
Dian Rakyat, 1991
Buku Teks
Frank, Marcella, author
Prentice-Hall, 1972
Buku Teks