:WP:SYNTH is clear that conclusions drawn from a combination of sources that aren't complete in each individual source is synthesis. You can refer to the material on the site based on information solely contained on that site, provided it meets other Wikipedia requirements. I have only skimmed the site myself but I would say that it comes dangerously close to being a self-published personal page which would not normally meet reliable source requirements. 

 :Wikipedia values verifiability and notability over truth and general relevance. In my opinion, the minimum requirements to include a source such as this would be that the author should be a notable authority or subject matter expert (as established by reliable third-party sources), and his site should clearly identify that the author is indeed that same notable authority. As it is, I didn't find any information in the source that confirmed the identity of the author as the Gerald Jones, only as a Gerald Jones. This probably seems like nit-picking semantics but for verifiability the source really needs to be explicit on this, or we risk false attribution which reduces the usefulness of the encyclopaedia. Unfortunately, at the moment, my interpretation of the relevant policies is that there's no way to include the source (in its current state) in the article.