White, Morton
1955
Buku Teks
Tietz, Jurgen, 1964-, author
H.F. Ullmann, 2013
Buku Teks
edited by Friedrich Kurrent ; translation from German into English, Gail Schamberger.
Birkhäuser, 1999
Buku Teks
edited by Tony Husband
Arcturus Publ, 2014
Buku Teks
Ewen, David, author
Prentice-Hall, 1989
Buku Referensi