Theil, H., author
North-Holland Publishing, 1975
Buku Teks
Antzoulatos, Angelos A.
Federal Reserve Bank of New York , 1997
Buku Teks
Hamberg, Daniel, author
Harper & Row, 1971
Buku Teks
edited by Marcel Boyer and Richard E. Kihlstrom
North-Holland Publishing, 1984
Buku Teks
Institute of Developing Economies, 1996
Buku Teks