Nadeau, Jay L., author
CRC Pres, 2012
Buku Teks
Gilat, Amos, author
Wiley, 2014
Buku Teks
Beasley, John D., author
Oxford University Press, 1988
Buku Teks
Havill, R.L., author
Macmillan, 1975
Buku Teks
Hanushek, Eric A., author
Academic Press, 1977
Buku Teks