Παραπομπή σε μορφή APA (7η εκδ.)
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.
Παραπομπή σε μορφή Chicago (17η εκδ.)
O'Rourke, Michael, και Jennifer Wikoff. Snow-related Roof Collapse During the Winter of 2010-2011: Implications for Building Codes. Reston, Virginia: American Society of Civil Engineers, 2014.
Παραπομπή σε μορφή MLA (9th εκδ.)
O'Rourke, Michael, και Jennifer Wikoff. Snow-related Roof Collapse During the Winter of 2010-2011: Implications for Building Codes. American Society of Civil Engineers, 2014.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.