- Commentaries on the Laws of England. اطلع عليه بتاريخ 19 سبتمبر 2016.
The most plausible opinion seems to be that adopted by those to etymologists, that the name was derived from the Esterlingi, or Easterlings, as those Saxons were anciently called who inhabited that district of Germany now occupied by the Hanse Towns and their appendages, the earliest traders in modern Europe.
- Falino، Jeannine؛ Ward، Gerald W. R.، المحررون (2001). New England Silver & Silversmithing 1620–1815. صفحة 156.
- "The Care of Silver"; Web article by Jeffrey Herman, silversmith, specialist in silver restoration and conservation. Retrieved 28 Nov 2017. نسخة محفوظة 26 يناير 2018 على موقع واي باك مشين.