These are the citations which are created when various Google Users save your business details. It works like underlining a line in a page. We underline the important thing. Similarly Google consider that your Business is important that's why people are saving it. Hence you get CITATION!
Well, we work on tight budget so we have our own list of sites. All are good! But still if you have custom list please discuss via Inbox. I will try to help you at my best!
Yes! But we do have limitation of doing Directory Submissions for US, UK Canada and Australia only. All other tasks can be done for any location of world