Storry, Richard, 1913-1982, author
Greenwood Press,, 1957
Buku Teks
Janeira, Armando Martins, author
Charles E. Tuttle, 1970
Koleksi Publik
Gay, Peter, author
Weidenfeld and Nicholson, 1966-1969
Buku Teks
Knox-Shaw, Peter, author
Cambridge University Press, 2009
eBooks
Pareto, Vilfredo, author
Frederick A. Praeger, 1966
Buku Teks