Warnecke, Andrea, author
Profiles Publishing, 2000
Buku Teks
Dzienkowski, John S., author
West Publishing, 1995
Buku Teks
Decker, Jefferson, author
Oxford University Press, 2016
eBooks
Smith, Ewart
Sun Books, 1989
Buku Teks
Shinohara, Hatsue, author
Cambridge University Press, 2012
Buku Teks