Chamberlain, Joseph P., author
Books for Libraries Press , 1942
Buku Teks
Amadeo, Santos P.
Columbia University Press, 1943
Buku Teks
Shapiro, Martin
The Free Press, 1968
Buku Teks
De Smith, S.A. (Stanley A.), author
Stevens & Sons Limited, 1980
Buku Teks
Cooper, Phillip J., author
Oxford University Press , 1988
Buku Teks