Churchill Livingstone, 1996
Buku Referensi
Churchill Livingstone, 1989
Buku Referensi
Oxford University Press, 2008
Buku Referensi
consultant ed. Tanya A. McFerran
Oxford University Press, 1996
Buku Referensi
edited by Elizabeth A. Martin
Fajar Bakti Sdn. Bhd., 2005
Buku Referensi