Greven,Philip J. (1970). Four generations: Population,land,and family in colonial Andover, Massachusetts. Cornell University Press.
Lua i Stíl Chicago (17ú heag.)Greven,Philip J. Four Generations: Population,land,and Family in Colonial Andover, Massachusetts. Ithaca, N.Y: Cornell University Press, 1970.
Lua MLA (9ú heag.)Greven,Philip J. Four Generations: Population,land,and Family in Colonial Andover, Massachusetts. Cornell University Press, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.