Laski, Harold J.
George Allen and Unwin, 1946
Buku Teks
Burke, Edmund, 1729-1797
J.M.Dent & Sons, 1955
Buku Teks
Laski, Harold J.
George Allen and Unwin, 1952
Buku Teks
Charles W. Eliot, edited
P. F. Collier & Son Corporation, 1959 ; 1969
Buku Referensi
Brogan, D.W. (Denis William)
Time, 1960
Buku Teks