edited by Pippo Ciorra and Marco D`Annuntiis
Skira, 2000
Buku Teks
Russell, Frank M.
Russell And Russell, 1951
Buku Teks
World Express Mapping Sdn. Bhd, [date of publication not identified]
Buku Referensi
World Express Mapping Sdn. Bhd, [date of publication not identified]
Buku Referensi
Busch, Harald, 1904
Umschau-Verlag, 1966
Buku Teks