Katz, Joel, author
N.J. : Wiley, 2012
Buku Teks
Booth, Grayce M., author
McGraw-Hill, 1983
Buku Teks
Vinogradoff, Paul, 1854-1925, author
Oxford University Press, 1970
Buku Teks
Vinogradoff, Paul, 1854-1925, author
Oxford University Press, 1959
Buku Teks
Russell, Bertrand, 1872-1970, author
Routledge, 2001
Buku Teks