edited by Carmen de Jong, David Collins, Roberto Ranzi
John Wiley & Sons, 2005
Buku Teks
Greenwood, Ned H.
Duxbury Press, 1979
Buku Teks
Josef Krecek, editor
Springer, 2012
eBooks
Wales, Horace Geoffrey Quaritch, 1900-
Bernard Quaritch, 1958
Buku Teks SO
edited by Levette Jay Davidson
University of Denver Press, 1951
Buku Teks