Roller, Edeltraud, author
Oxford University Press, 2008
Buku Teks
Bowler, Shaun
The University of Michigan Press, 200
Buku Teks
Emerson, Peter
Springer, 2012
eBooks
Powell, G. Bingham, author
Yale University Press, 2000
Buku Teks
Joni Lovenduski
Cambridge University Press, 2005
Buku Teks