Copyright is considered to be the right of an author to control the use of their work by others.  Print works may be reproduced as long as the reproduction is not more than 10% of the entire work or 1000 words.  (Whichever is less).  If you are going to copy a greater portion of the work, you will need to contact the copyright holder for permission.  If you are not sure if an item is protected by copyright, you can use this tool from the American Library Association.  You can also use this tool from the Copyright Management Center at Indiana University-Purdue University Indianapolis.