Wadsworth. The World of Credit in Colonial Massachusetts. University of Massachusetts Press.
Lua i Stíl Chicago (17ú heag.)Wadsworth. The World of Credit in Colonial Massachusetts. University of Massachusetts Press.
Lua MLA (9ú heag.)Wadsworth. The World of Credit in Colonial Massachusetts. University of Massachusetts Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.