A great way to cite a source - Link to it... There is nothing that says you can't post a link to a site that contains the information you wish to discuss. The only thing you can't do is put a link to spam, porn, or a clear attempt that you are trying to sell something for your own gain.
Also I don't mind select quotes from an article that is properly cited for discussion, but I don't like an entire story/article copy and pasted in especially if it is not clear if the information that is being pasted is copyright material or not.
A better way to have shared the information
Also the share button on the original article does not send or share the full article, just the first couple of lines with a link to the site. So in a sense, the "Share" button does not give you the right to copy and paste, but simply alert with a link to the article.
While this particular article is clearly a press release it could have gone as is, however there is nothing denoting on that particular page that the information is a press release (usually noted by Official Press Release tag), nor is there any Fair Use of CC tag on that page or the Facebook site that says the information can be posted elsewhere.