Halsall, Fred, author
Pitman, 1982
Buku Teks
Carr, Joseph J., author
Tab Books, 1982
Buku Referensi
Dollhoff, Terry, author
Reston Pub., 1979
Buku Teks
Davis, Thomas W., author
Reston Pub., 1981
Buku Teks
Ghani, Noordin, author
Research Study Press, 1980
Buku Teks