Drury, John
Story Press, 1995
Buku Referensi
Deutsch, Babette
Funk & Wagnalls, 1957
Buku Referensi
Baldick, chris
Oxford University Press, 1990
Buku Referensi
Lennard, John
University Press, 2005
Buku Referensi
Mara, Cynthia Massie, editor; Olson, Laura Katz, editor
CRC Press, 2008
Buku Referensi