Mackintosh, Chaerles Rennie, author
The Foulis Press, 1995
Buku Teks
Hauser, Arnold, author
Routledge & Kegan Paul, 1959
Buku Teks
Lund humphries,
Majalah, Jurnal, Buletin
Smith, Bernard, author
Oxford University Press, 1976
Buku Teks
Hauser, Arnold, author
Alfred A. Knopf , 1952
Buku Teks