Wicksell, Knut
Lectures on political economy / by Knut Wicksell; edited with and introduction by Lionel, Robbins
George Routledge and Sons , 1946
 Buku Teks
Italy at the millennium: Economy, politics, literature and journalism
Paolo Janni
The council for research in values and philoaophy, 2001
 Buku Teks
Schiller, Bradley R.
The economy/Bradlcy R. Schiller
Prentice-Hall, 1975
 Buku Teks
Robinson, Marshall A.
An Introduction to economy reasoning
Brookings Institution, 1955
 Buku Teks
Brown, A.J.
Introduction to the world economy
George Allen and Unwin, 1959
 Buku Teks