Schaaf, William L.
Collier Books, 1966
Buku Teks
Schaaf, William L.
Wiley-Academy, 1965
Buku Teks
Montague, Harriet F., author
Charles E. Merrill, 1963
Buku Teks
Young, Frederick H., author
John Wiley & Sons, 1968
Buku Teks
Smith, Karl J., author
Brooks/Cole, 1973
Buku Teks