Powell, Colin L.
Perjalanan seorang Amerika=My American journey : an autobiography
Angkasa, 2001
 Buku Teks
Lacey, Nicola
A life of H.L.A. Hart : the nightmare and the noble dream
Oxford University Press, 2006
 Buku Teks
The European inheritance
edited by Sir Ernest Barker, George Clark
Clarendon, 1954
 Buku Teks
The European inheritance / edited by Sir Ernest Barker, Sir George Clark, Paul Vaucher
edited by Sir Ernest Barker, Sir George Clark, Paul Vaucher
Clarendon Press, 1954
 Buku Teks
The European inheritance / edited by Sir Ernest Barker, Sir George Clark, Paul Vaucher
[edited by Sir Ernest Barker, Sir George Clark and Paul Vaucher, ]
Clarendon Press, 1954
 Buku Teks