Paper  bibtex   

@misc{ the_college_of_physicians_of_philadelphia_vaccination_????,
  title = {Vaccination Exemptions — History of Vaccines},
  url = {http://www.historyofvaccines.org/content/articles/vaccination-exemptions},
  urldate = {2013-11-09},
  author = {{The College of Physicians of Philadelphia}},
  file = {Vaccination Exemptions — History of Vaccines:C\:\\Users\\jdodell\\AppData\\Roaming\\Mozilla\\Firefox\\Profiles\\gngr6308.default\\zotero\\storage\\DENTK3AQ\\vaccination-exemptions.html:text/html}
}