Malthus, T.R.
N.Y. Kelley & Millman , 1954
Buku Teks
Robbins, Lionel, editor
McMillan & Co., 1952
Buku Teks
Gurukkal, Rajan
Oxford University Press, 2016
eBooks
Byung-Nak Song
University Press, 2003
Buku Teks
Bagchi, Amiya Kumar
Cambridge University Press , 1984
Buku Teks