Jenkins, Elizabeth
Coward-McCann, 1962
Buku Teks
Harding, Bertita
Indianapolis The Bobbs-Merrill, 1937
Buku Teks
Neale, J. E.
Penguin Books, 1960
Buku Teks
Summons, Elizabeth
Pegaus Books, 1979
Buku Teks
Cash, Allen J., author
The Automobile Association, 1987
Buku Referensi