Once you finish your search and locate information, you need to know when and how much you are entitled to copy, for research and study, from the materials you find.
To handle this problem you should aware about--
Referencing
Referencing is an important part of all academic writing. All work used which is not your own needs to be referenced.
Essential components of any system of referencing --

The author (including initials)
The date of publication of the work
The title of the specific work
The publisher of the work (for books, etc.)
The place of publication of the work (for books, etc.)
The exact place (i.e. the page number/s) where the text referred to can be found

The first thing to remember when citing a webpage is that websites move or disappear very quickly. Therefore, you should include the date on which you accessed the website in your citation.

For any particular source, the first footnote should give all the reference details. If you then follow
immediately with another reference to exactly the same work by the same author, use ibid (meaning the same place) and give the page number.
eg. 9. Ibid, p.58

Checking Copyright

Copyright is a difficult issue for users to ignore (even if you try) as there is so much information that you need to photocopy or download to support you in your learning. However, it can be difficult to know when you are breaching copyright. For this reason it is very important that you are aware of when you are likely to breach copyright.

Copyright protects:

literary works (eg. magazine articles, poems, short stories, novels, computer programs, technical
manuals, textbooks, websites, emails);
musical works;
artistic works (eg. paintings, photographs, maps, sculptures, and drawings);
films (eg. the visual images of: movies, video cassettes, television programs, and commercials);
sound recordings (eg. records, compact discs and audio cassettes);
broadcasts: any radio and broadcast signals, including cable;
computer programs;
published editions (the typographical arrangement of a published work);
the right of communication to the public, via broadcast radio, TV, cable or online

Copyright on the net

It is a common misconception that anything on the Internet is free to download or copy. Material found on the Internet is generally automatically covered by copyright. Certain material will always be protected by copyright, such as a photo or a painting, no matter in what medium it is published.