Longman, 1989
Buku Teks
Davis, Kingsley, 1908-1997, author
Macmillan, 1949
Buku Teks
Davis, Kingsley, 1908-1997, author
Macmillan, 1960
Buku Teks
Collins, Randall, author
Random House, 1984
Buku Teks
Davis, Kingsley, 1908-1997, author
Macmillan, 1964
Buku Teks