Toobin, Jeffrey, author
Doubleday, 2012
Buku Teks
Kingdon, Frank, author
Arco Publishing, 1944
Buku Teks
Schlesinger, Arthur Meier, author
Fawcett Publications, 1965
Buku Teks
Parks, Lillian Rogers
Fleet Publishing , 1961
Buku Teks
Sorensen, Theodore C., author
Columbia University Press, 1964
Buku Teks