CBE Internet references

In general, CBE references to Internet sources follow CBE format with the addition of information about the source's URL and the retrieval date （important because web documents are by their nature dynamic）. For formatting the examples below, I have followed Andrew Harnack and Eugene Kleppinger, Online! A Reference Guide to Using Internet Sources （New York: Bedford / St. Martin's, 2000）.
    E1. Web site
    E2. Article in an online journal
    E3. Abstract
     E4. Newspaper article
    E5. Government publication
     E6. Forum or conference posting
    E7. Email
    E1. Web site
    Reference
    Dupont Corp. 2000. Dupont biotechnology. Accessed 2000 Sept. 12.
    E2. Article in an online journal
    Reference
    Zhan D, Holmes WF, Shujian W, Soprano DR, Soprano KJ. 2000. Retinoids and ovarian cancer. Journal of Cellular Physiology 185（1）:1-20. Accessed 2000 Oct 3.
    E3. Abstract
    Reference
    Kidd AH, Garwicz D. 1995 Feb 1. Human and simian adenoviruses: phylogenetic inferences from analysis of VA RNA genes [abstract]. In Virology 207（1）:32-45. IDEAL database Accessed 2000 Sept 12.
    E4. Newspaper article
    Reference
    [Anonymous.] 2000 Sept. 29. 11,000 species said to face extinction, with pace quickening. New York Times. . Accessed 2000 Oct 1.
    E5. Government publication
    Reference
    U.S. Environmental Protection Agency. 2000 Oct. 1. Resources for promoting global business principles and best practices: a directory of people, organizations and web sites. . Accessed 2000 Oct 1.
    E6. Forum or conference posting
    Reference
    Jensen W. 2000 Apr. 17. Re: question about grading essays. Accessed 2000 July 18.
    E7. Email
    Reference
    Hubley M. 2000 Aug. 17. Re: biology citation style [Personal email].