1.
Four essays on liberty. London, New York [etc.]: Oxford University Press; 1969.
Four essays on liberty. London, New York [etc.] : Oxford University Press, 2 mai 1969. ISBN 0-19-500272-5
Berlin Isaiah. (1969). Four essays on liberty. Oxford University Press.
Style de citation MLA (8e éd.)Berlin Isaiah. Four Essays on Liberty. Oxford University Press, 1969.
Attention : ces citations peuvent ne pas être correctes à 100%.