Heilbroner, Robert L., author
Simon Schuster, 1961
Buku Teks
edited by David Greenaway, Michael Bleaney, and Ian Stewart
Routledge, 1991
Buku Referensi
Macgregor, D.H., author
Oxford University Press, 1949
Buku Teks
Kirzner, Israel M., author
D. Van Nostrand , 1960
Buku Teks
Gopalakkrishnan, Panikkanparambil Kesavan
Institute of Social Studies, 1954
Buku Teks