The Encyclopedia Americana : volume 1
Americana Corporation, 1977
 Buku Referensi
The Columbia encyclopedia; Volume II
edited by William Bridgwater dan Seymour Kurtz
Columbia University Press, 1963
 Buku Referensi
The Columbia encyclopedia; Volume III
edited by William Bridgwater dan Seymour Kurtz
Columbia University Press, 1963
 Buku Referensi
The Columbia encyclopedia; Volume IV
edited by William Bridgwater dan Seymour Kurtz
Columbia University Press, 1963
 Buku Referensi
The Encyclopedia Americana : volume 3
Americana Corporation, 1977
 Buku Referensi
<<   2 3 4   >>