Use the 13 digit ISBN number (when available) to identify the books you use. Use the 10 digit ISBN number when a 13 digit number is not printed in the book.
If your book is old and predates ISBN numbers (published before 1970), look it up at http://www.worldcat.org and use the OCLC number. In this instance, the in-text citation would be: (oclc 944674) and the text + sources cited format would be: 4. oclc 944674.
In-Text + Sources Cited:
A short summary of Lanning’s book would state that information literacy is very important. (4) Information literacy is…
Sources Cited:
2. http://search.ebscohost.com/login.aspx?direct=true&db=aph&AN=78333682&site=ehost-live
3. 10.1242/jeb.058032
4. 9781598849493