These resources are based on the 16th edition (2010) of the Chicago Manual of Style.
These links will give you information on citing sources according to the 7th edition of A Manual for Writers of Research Papers, Theses, and Dissertations by Kate Turabian.
There are many online resources relating to the study of media from a historical perspective. This list of resources, while by no means exhaustive, provides a basic starting point for you research.
Articles from scholarly journals in the humanities, social sciences, and sciences. NOTE: In many cases, articles from the last 3-5 years are NOT available due to publisher copyright restrictions.