The Great family encyclopedic dictionary
Bay Books, 1986
Buku Referensi
Encyclopedia of knowledge : volume 8
Grolier Incorporated, 1991
Buku Referensi
Encyclopedia of knowledge : volume 7
Grolier Incorporated, 1991
Buku Referensi
Encyclopedia of knowledge : volume 6
Grolier Incorporated, 1991
Buku Referensi
Encyclopedia of knowledge : volume 5
Grolier Incorporated, 1991
Buku Referensi