Halliday, M.A.K.
Computational and quantitative studies
Continuum, 2005
 Buku Teks
Laski, Harold J.
A Grammar of Politics
George Allen and Unwin, 1948
 Buku Teks
Laski, Harold J.
A Grammar of Politics
George Allen and Unwin, 1950
 Buku Teks
Laski, Harold J.
A grammar of politics
George Allen and Unwin, 1955
 Buku Teks
Laski, Harold J.
A grammar of politics
George Allen and Unwin, 1957
 Buku Teks