Weil, David N.
Pearsons Addison-Wesley, 2009
Buku Teks
Rostow, Walt Whitman
W.W. Norton, 1962
Buku Teks SO
edited by Ralph Landau, Timothy Taylor and Gavin Wright
Stanford University Press, 1996
Buku Teks SO
Morishima, Michio
Oxford University Press, 1970
Buku Teks SO
Barro, Robert J.
McGraw-Hill, 1995
Buku Teks SO