APA-referens (7:e uppl.)
O'Rourke, M., & Wikoff, J. (2014). Snow-related roof collapse during the winter of 2010-2011: Implications for building codes. American Society of Civil Engineers.
Chicago-referens (17:e uppl.)
O'Rourke, Michael, och Jennifer Wikoff. Snow-related Roof Collapse During the Winter of 2010-2011: Implications for Building Codes. Reston, Virginia: American Society of Civil Engineers, 2014.
MLA-referens (9:e uppl.)
O'Rourke, Michael, och Jennifer Wikoff. Snow-related Roof Collapse During the Winter of 2010-2011: Implications for Building Codes. American Society of Civil Engineers, 2014.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.