Langford, Teddy L., author
Prentice-Hall, 1981
Buku Teks
Yura, Helen, author
Appleton , 1981
Buku Teks
Hayne, Arlene Nash
An Aspen Publication, 1982
Buku Teks
Conway, Mary E., author
Appleton , 1983
Buku Teks
Simms, Lillian M., author
Delmar Publisher , 1985
Buku Teks