http://www.phmc.state.pa.us/portal/communities/pa-history/1681-1776.html
https://www.boundless.com/u-s-history/textbooks/boundless-u-s-history-textbook/britain-and-the-settling-of-the-colonies-1600-1750-3/settling-the-middle-colonies-42/the-demographics-of-the-middle-colonies-283-568/
https://www.landofthebrave.info/pennsylvania-colony.htm
http://www.ushistory.org/penn/bio.htm
https://www.boundless.com/u-s-history/textbooks/boundless-u-s-history-textbook/britain-and-the-settling-of-the-colonies-1600-1750-3/settling-the-middle-colonies-42/the-demographics-of-the-middle-colonies-283-568/
https://www.landofthebrave.info/pennsylvania-colony.htm
http://www.ushistory.org/penn/bio.htm