Iversen, Torben, author
Cambridge University Press, 2006
Buku Teks
Baumol, William J., author
Mass. Harvard University Press, 1952
Buku Teks
Nath, S. K.
Augustus M. Kelley, 1969
Buku Teks
Rothenberg, Jerome
Prentice-Hall, 1961
Buku Teks
Lerner, Abba P. (Abba Ptachya), 1903-1982, author
Macmillan, 1958
Buku Teks