Encyclopaedia Britannica : volume 8
Encyclopaedia Britannica Inc., 1967
 Buku Referensi
Encyclopaedia Britannica : volume 8
Encyclopaedia Britannica Inc., 1968
 Buku Referensi
The Australian encyclopaedia : volume 8
Grolier Society of Australia, 1983
 Buku Referensi
Encyclopaedia universalis : volume 8
Encyclopaedia Universalis France S.A. , 1989
 Buku Referensi
The New Encyclopaedia Britannica : volume 8
Encyclopaedia Britannica Inc., 1988
 Buku Referensi