Because the internet and web-based sources are extremely popular among students, confusion arises in most classes about proper documentation of such information. In most instances, the same rules apply here as for printed sources. If you borrow any information from an internet source, you must cite it, including visuals, graphics, statistical reports, lab reports, even personal essays posted online. For sources with no pagination, many style manuals ask that you count the number of paragraphs contained in the document and refer to the information that you cite by paragraph number.
You must be careful of the information provided from such sources so that you are quoting legitimate information, but any borrowed information must be documented so that your readers are clear about the origin of such information and know precisely where to go to obtain additional information from a cited source. Copying graphs and texts may require permission from the site's owner. Once again, always err on the side of caution.
Whether you're considering an Internet source or any other type of source, be sure to evaluate its usefulness to your paper.
One way to do that is by the RADAR method:
Specific questions to consider as you evaluate these areas:
Adapted from the RADAR Framework available on the “Evaluating Sources: Using the RADAR Framework” LibGuide from the LMU LA William H. Hannon Library: http://libguides.lmu.edu/aboutRADAR