Dokument na internetu:
McClintock, R. Power and Pedagogy: Transforming Education through Information Technology, 1992. Columbia University Institute for Learning Technologies Web site. http://www.ilt.columbia.edu/publications/mcclintock.html (accessed Dec 11, 2009).

Alfred Bader Award in Bioinorganic or Bioorganic Chemistry. ACS Web site. http://webapps.acs.org/findawards/detail.jsp?ContentId=CTP_004490 (accessed Sept 17, 2009).

Study of Selected Petroleum Refining Residuals, 1996. U.S. Environmental Protection Agency Web site. http://www.epa.gov/epawaste/hazard/wastetypes/wasteid/studies.htm (accessed Aug 20, 2009).

Webová stránka:
CAS Home Page. http://cas.org (accessed Dec 21, 2009).

U.S. Environmental Protection Agency Home Page. http://www.epa.gov (accessed Dec 21, 2009).