Dyfyniad APA
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.
Dyfyniad Arddull Chicago
O'Rourke, Michael, and Jennifer Wikoff. Snow-related Roof Collapse During the Winter of 2010-2011: Implications for Building Codes. Reston, Virginia: American Society of Civil Engineers, 2014.
Dyfyniad MLA
O'Rourke, Michael, and Jennifer Wikoff. Snow-related Roof Collapse During the Winter of 2010-2011: Implications for Building Codes. American Society of Civil Engineers, 2014.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.