特拉华州行政区划 (Chinese Wikipedia)

The Hundreds of Delaware: 1700 - 1800. Delaware Division of Historical and Cultural Affairs. Government of Delaware. [2019-02-25]. （原始内容存档于2008-02-20）（英语）.

delgensoc.org

Delaware Counties. Delaware Genealogical Society. [2019-07-17]. （原始内容存档于2016-12-27）（英语）.
Delaware Hundreds. Delaware Genealogical Society. [2019-07-17]. （原始内容存档于2016-03-04）（英语）.

epa.gov

EPA County FIPS Code Listing. United States Environmental Protection Agency. [2018-02-23]. （原始内容存档于2004-09-28）（英语）.

lewestownpublishers.com

Hazel D. Brittingham. The Name of Whorekill. Lewestown Publishers. 1997 [2007-04-24]. （原始内容存档于2011-07-13）（英语）.

naco.org

NACo - Find a county. National Association of Counties. [2019-04-30]. （原始内容存档于2007-10-25）（英语）.

nccde.org

czo.nccde.org

Unified Development Code. New Castle County. [2018-10-01]. （原始内容存档于2018-10-04）（英语）.

nist.gov

itl.nist.gov

FIPS Publish 6-4. National Institute of Standards and Technology. [2019-04-11]. （原始内容存档于2013-09-29）（英语）.

peninsularoots.com

Slavens, Chris. Whorekill and Murderkill: Reclaiming Delaware's Unsavory Place-names, part 1. Peninsula Roots. 2016-02-21 [2019-07-17]. （原始内容存档于2021-12-06）（英语）.

phillyh2o.org

J. Thomas Scharf and Thompson Westcott. CHAPTER 1: Topography of Philadelphia. History of Philadelphia 1609-1884. Philadelphia Water Department（英语：Philadelphia Water Department）. [2008-02-24]. （原始内容存档于2008-05-11）（英语）.

udel.edu

www1.udel.edu

John Mackenzie. A brief history of the Mason-Dixon survey line. University of Delaware. [2019-04-24] （英语）. ^{[永久失效連結]}

web.archive.org

How Many Counties are in Your State?. Click and learn. 2000 [2018-08-26]. （原始内容存档于2009-04-22）（英语）.
TITLE 9 - CHAPTER 41. GOVERNMENT OF KENT COUNTY - Subchapter II. Powers and Duties. Delaware Code Online. Government of Delaware（英语：Delaware#Law_and_government）. [2019-07-17]. （原始内容存档于2018-08-22）（英语）.
The Hundreds of Delaware: 1700 - 1800. Delaware Division of Historical and Cultural Affairs. Government of Delaware. [2019-02-25]. （原始内容存档于2008-02-20）（英语）.
FIPS Publish 6-4. National Institute of Standards and Technology. [2019-04-11]. （原始内容存档于2013-09-29）（英语）.
Delaware Counties. Delaware Genealogical Society. [2019-07-17]. （原始内容存档于2016-12-27）（英语）.
Hazel D. Brittingham. The Name of Whorekill. Lewestown Publishers. 1997 [2007-04-24]. （原始内容存档于2011-07-13）（英语）.
Slavens, Chris. Whorekill and Murderkill: Reclaiming Delaware's Unsavory Place-names, part 1. Peninsula Roots. 2016-02-21 [2019-07-17]. （原始内容存档于2021-12-06）（英语）.
Delaware Hundreds. Delaware Genealogical Society. [2019-07-17]. （原始内容存档于2016-03-04）（英语）.
J. Thomas Scharf and Thompson Westcott. CHAPTER 1: Topography of Philadelphia. History of Philadelphia 1609-1884. Philadelphia Water Department（英语：Philadelphia Water Department）. [2008-02-24]. （原始内容存档于2008-05-11）（英语）.
Chester County, PA - Official Website. County of Chester. [2019-07-17]. （原始内容存档于2019-06-12）（英语）.
Delaware Facts. Delaware Historical Society（英语：Delaware Historical Society）. [2019-07-17]. （原始内容存档于2019-07-07）（英语）.
Unified Development Code. New Castle County. [2018-10-01]. （原始内容存档于2018-10-04）（英语）.
EPA County FIPS Code Listing. United States Environmental Protection Agency. [2018-02-23]. （原始内容存档于2004-09-28）（英语）.
NACo - Find a county. National Association of Counties. [2019-04-30]. （原始内容存档于2007-10-25）（英语）.
Kane, Joseph & Aiken, Charles. The American Counties: Origins of County Names, Dates of Creation, and Population Data, 1950-2000. Scarecrow Press（英语：Rowman & Littlefield）. 2004 [2019-07-12]. ISBN 9780810850361. （原始内容存档于2015-03-20）（英语）.
U.S. Census Bureau QuickFacts: Delaware. United States Census Bureau. [2019-07-15]. （原始内容存档于2019-04-06）（英语）.

wikipedia.org

en.wikipedia.org

TITLE 9 - CHAPTER 41. GOVERNMENT OF KENT COUNTY - Subchapter II. Powers and Duties. Delaware Code Online. Government of Delaware（英语：Delaware#Law_and_government）. [2019-07-17]. （原始内容存档于2018-08-22）（英语）.
J. Thomas Scharf and Thompson Westcott. CHAPTER 1: Topography of Philadelphia. History of Philadelphia 1609-1884. Philadelphia Water Department（英语：Philadelphia Water Department）. [2008-02-24]. （原始内容存档于2008-05-11）（英语）.
Delaware Facts. Delaware Historical Society（英语：Delaware Historical Society）. [2019-07-17]. （原始内容存档于2019-07-07）（英语）.
Kane, Joseph & Aiken, Charles. The American Counties: Origins of County Names, Dates of Creation, and Population Data, 1950-2000. Scarecrow Press（英语：Rowman & Littlefield）. 2004 [2019-07-12]. ISBN 9780810850361. （原始内容存档于2015-03-20）（英语）.