general editor, Sir Lawrence Gowing
Encyclopaedia Britannica, 2005
Buku Referensi
general editor, Sir Lawrence Gowing
Encyclopaedia Britannica, 2005
Buku Referensi
Encyclopaedia Britannica Inc., 2003
Buku Referensi
Encyclopaedia Britannica Inc., 1978
Buku Referensi
Encyclopaedia Britannica Inc., 1967
Buku Referensi