Booth, Grayce M.
McGraw-Hill, 1983
Buku Teks
Vinogradoff, Paul, 1854-1925
Oxford University Press, 1970
Buku Teks
Vinogradoff, Paul, 1854-1925
Oxford University Press, 1959
Buku Teks
Russell, Bertrand, 1872-1970
Routledge, 2001
Buku Teks
Lasker, Emanuel
Dover, 1965
Buku Teks