Insect and disease conditions report, Northeastern Area
  MLA
  Insect and Disease Conditions Report, Northeastern Area. Newtown Square, Pa: USDA Forest Service, .
  APA
  Insect and disease conditions report, Northeastern Area. Newtown Square, Pa: USDA Forest Service.
  Chicago
  Insect and Disease Conditions Report, Northeastern Area. Newtown Square, Pa: USDA Forest Service.