edited by H.S.D. Cole ... [et. al.]
Chatto & Windus for Sussex University Press, 1973
Buku Teks
Barro, Robert J., author
McGraw-Hill, 1995
Buku Teks
Barro, Robert J., author
MIT Press, 2003
Buku Teks
Wan, Henry Y., author
Harcourt Brace Jovanovich, 1971
Buku Teks
Hanson, James A., author
Springer-Verlag, 1971
Buku Teks