4 links
Columbia Encyclopedia: Pufendorf, Samuel, Baron von
bartleby.com
Concise article from the 2001 edition.
On the Duty of Man and Citizen
constitution.org
This 1682 classic by Pufendorf, as translated into English by Frank Gardner Moore.
Wikipedia: Samuel Pufendorf
en.wikipedia.org
Article incorporating information from the 1911 Britannica.