APA (6th ed.):
ProCon.org. (2015, October 1). School Shootings since Sandy Hook. Retrieved from https://www.procon.org/school-shootings-since-sandy-hook/
[Editor's Note: The APA citation style requires double spacing within entries.]
Chicago (17th ed.):
ProCon.org, "School Shootings since Sandy Hook," ProCon.org. last modified October 1, 2015. https://www.procon.org/school-shootings-since-sandy-hook/.
MLA (8th ed.):
ProCon.org, "School Shootings since Sandy Hook." ProCon.org. 1 Oct. 2015, www.procon.org/school-shootings-since-sandy-hook/
[Editor’s Note: The MLA citation style requires double spacing within entries.]
Turabian (8th ed.):
ProCon.org. "School Shootings since Sandy Hook." ProCon.org. Last modified on October 1, 2015. Accessed January 21, 2021. https://www.procon.org/school-shootings-since-sandy-hook/