Research Sources

AllMovie is helpful for determining what to name each subgenre of my guide. It is very detailed, up to date and useful in that it already has the films categorized.
http://www.allmovie.com/genre/horror-d654

The same goes for filmsite.org which caters for all genres, too, but has good applicable names for subgenres
http://www.filmsite.org/subgenres2.html

The Hamlyn Book of Ghosts in Fact and Fiction by Daniel Farson
Not as up to date as it was written in 1981, but I quite like the layout

The Encylopedia of Horror by Richard Davis
The same applies to this book