The Encyclopedia Americana : volume 4
Americana Corporation, 1964
Buku Referensi
Collier's encyclopedia : volume 4
Macmillan Educational Company, 1990
Buku Referensi
Encyclopedia of knowledge : volume 4
Grolier Incorporated, 1991
Buku Referensi
The New Encyclopedia Britannica : volume 4
Encyclopedia Britannica, 1983
Buku Referensi
The New Encyclopedia Britannica : volume 4
Encyclopedia Britannica, 1983
Buku Referensi