有的外文文献没有页码

NANCY ALDRICH, WILLIAM F BENSON Disaster Preparedness and the Chronic Disease Needs of Vulnerable Older Adults[J] Prev Chronic Dis, 2008,5(1)Preventing Chronic Disease 是一份电子刊物，所以没有起止页码。你在引用这遍文章时应该把以下网址也包括在内。_htmSPRENGER M Integrated health management for the elderly in several regions of Styria 2006-2007[J] Eur J Public Health, 2005, 15起止页码都是 33。