edited by David Greenaway, Michael Bleaney, and Ian Stewart
Routledge, 1991
Buku Referensi
edited by Warren J. Samuels, Jeff E. Biddle, John B. Davis
Blackwell, 2003
Buku Teks
Macgregor, D.H., author
Oxford University Press, 1949
Buku Teks
Kirzner, Israel M., author
D. Van Nostrand , 1960
Buku Teks
Landauer, Carl, author
J. B. Lippincott, 1964
Buku Teks