King, James J., author
John Wiley & Sons, 1995
Buku Referensi
Ronan, Jana Smith, author
Libraries Unlimited, 2003
Buku Teks
Signet Book, 1962
Buku Teks
Albert, Loy Morehead, editors
New American Library, 1972
Buku Referensi
editor, Gunadi
Multi Utama Publishing, 2002
Buku Teks