Altschul, Annie, author
Bailliere Tindall , 1986
Buku Teks
Altschul, Annie, author
Bailliere Tindall , 1981
Buku Teks
Fisher, Evryl E., author
Juta & Company Ltd., 1979
Buku Teks
Dennis, Lorraine Bradt, author
WB. Saunders, 1967
Buku Teks
Niven, Neil
Churchill Livingstone , 1994
Buku Teks