Heudorfer, Bonnie; Bluestone, Barry (2004). „The Greater Boston Housing Report Card”(PDF). Center for Urban and Regional Policy (CURP), Northeastern University. стр. 6. Архивирано из оригинала(pdf) 8. 11. 2006. г. Приступљено 19. 2. 2007.
Heudorfer, Bonnie; Bluestone, Barry (2004). „The Greater Boston Housing Report Card”(PDF). Center for Urban and Regional Policy (CURP), Northeastern University. стр. 6. Архивирано из оригинала(pdf) 8. 11. 2006. г. Приступљено 19. 2. 2007.