Spencer, Donald D.
Prentice-Hall, 1977
Buku Teks
Watkins, R. P., author
John Wiley & Sons, 1974
Buku Teks
Nanney, T. Ray, author
Prentice-Hall, 1981
Buku Teks
Dyck, V.A., author
Reston, 1984
Buku Teks
Etter, Delores M. (Delores Maria), 1947-, author
Benjamin/Cummings, 1984
Buku Teks