Artikel Jurnal
Bindseil, Ulrich
Oxford University Press, 2014
Buku Teks
Horvitz, Paul M.
Prentice-Hall, 1963
Buku Teks
Meek, Paul
NY (33 Liberty St., New York 10045) : Federal Reserve Bank of New York, 1982
Buku Teks
Mohamad Ikhsan
University of Indonesia, 1991
Buku Teks