Ziegler, David M., author
Little, Brown, 1981
Buku Teks
Ziegler, David M., author
Little, Brown, 1981
Buku Teks
Grob, Fritz, author
Yale University Press, 1949
Buku Klasik
Gray, Colin S., author
Routledge, 2012
Buku Teks
Tolstoy, Leo, graf, 1828-1910, author
Penguin Books, 2016
Buku Teks