Amalrik, Andrei, author
Harper and Row, 1980
Buku Teks
Thompson, June M., author
Westview Press, 1990
Buku Teks
Walsh, Warren Bartlett, author
The University of Michigan Press, 1958
Buku Teks
The University of Chicago Press, 1983
Buku Teks
Meyer, Frank S.
Harcourt Brace, 1961
Buku Teks