Dentreves, A.P.
Natural law : an introduction to legal philosophy
Hutchinson`s University Library, 1951
 Buku Teks
Cohan, Morris R.
Law and the social order essays in legal philosophy
Transactio Books, 1982
 Buku Teks
Losee, John
A Historical introduction to the philosophy of science
Oxford University Press, 1980
 Buku Teks SO
Wolf, Hans Julius
Roman law an historical introduction
University of Oklahoma Press, 1978
 Buku Teks SO
Pound, Roscoe
An Introduction to the philosophy of law
Yale University Press, 1954
 Buku Teks