The World book encyclopedia : volume 9
World Book, 1985
Buku Referensi
The New Encyclopaedia Britannica : volume 9
Encyclopaedia Britannica Inc., 2003
Buku Referensi
The New Encyclopedia Britannica : volume 9
Encyclopedia Britannica, 1983
Buku Referensi
The New Encyclopaedia Britannica : volume 9
Encyclopaedia Britannica Inc., 1978
Buku Referensi
The New Encyclopaedia Britannica : volume 9
Encyclopaedia Britannica Inc., 1983
Buku Referensi