Malthus, Thomas
Oxford University Press, 1993
Buku Teks
Macaulay
Oxford Clarendon [t.th.]
Buku Teks
Tytler, Alexander Fraser
Amsterdam John Benjamins B.V. 1978
Buku Teks
New York Pocket Books 1957
Buku Teks
Goldman, Stephen H., author
Houghton Miffiln, 1986
Buku Teks