Pilcher, Rosamunde, author
Corner Books, 1971
Buku Teks
Forster, E.M. (Edward Morgan), 1879-1970, author
Everyman`s Library, 1991
Buku Referensi
Hall, Ford P.
McGraw-Hill Book Company , 1949
Buku Teks
Sward, Keith
Atheneum, 1948
Buku Teks
Ford Foundatuon, 2007
Buku Teks