Sparkes, Brian A
Routledge, 1996
Buku Teks
Sparkes, Brian A., author
London : Routledge, 2006,
Buku Teks
Colbeck, John
Watson-Guptill Publications, 1969
Buku Teks
Warner, Rex, 1905-1986, author
The New American Library, 1958
Buku Teks
Hamilton, Edith, author
W.W. Norton, 1942
Buku Teks