HarperCollin Publishers, 1995
Buku Referensi
HarperCollins Publishers, 1993
Buku Referensi
editor in chief, John Sinclair
HarperCollins Publishers, 1995
Buku Referensi
Kamm, Antony, author
Harper Collins Pub., 1993
Buku Referensi
editor in chief John Sinclair
Collins, 1991
Buku Referensi