Rice, Thomas Jackson, author
Gale Research Company, 1983
Buku Referensi
Kirby, David K., author
Gale Research, 1975
Buku Referensi
Mell, Donald C.
Gale Research Company, 1982
Buku Referensi
Blazek, Ron, author
Libraries Unlimited, 2000
Buku Referensi
Antony, Arthur, author
John Wiley & Sons, 1979
Buku Teks