edited by Francis Robinson
Cambridge University Press, 1996
Buku Teks
edited by Francis Robinson
Cambridge University Press, 1996
Buku Referensi
Watt, William Montgomery, author
Sidwick and Jackson, 1976
Buku Teks
Robinson, Francis, author
Facts on File, 1982
Buku Referensi
edited by George Michell
Thames and Hudson, 1995
Buku Referensi