Kuznets, Simon Smith, 1901-, author
Princeton University Press, 1961
Buku Teks
Tostlebe, Alvin S.
Princenton University Press , 1957
Buku Teks
Moulton, Harold G., author
Brookings Institution, 1935
Buku Teks
Aspen Systems Corporation, 1983
Buku Teks
Rosovsky, Henry, author
Free Press, 1961
Buku Teks