Finch, John
Introduction to legal theory
Sweet & Maxwell, 1974
 Buku Teks
Ward, Ian
Introduction to critical legal theory
Routledge. Cavendish. Taylor & Francis Group, 2004
 Buku Teks
Finch, John
Introduction to legal theory
Sweet & Maxwell, 1970
 Buku Teks
Joseph, Raz
The concept of a legal system an introduction to the theory of legal system
Oxford Clarendon Press, 1970
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Dowling, Edward Thomas
Schaum's outline of theory and problems of introduction to mathematical economics
McGraw-Hill, 1992
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