Let us bypass all of the wannabe attorneys and those that are actual attorneys and go straight to the horses mouth, so to speak, in regard to the subject of 'Citizenship'. The link will allow you to access a pdf (too large to upload to the forum) entitled "Citizenship Laws of the World".
http://www.multiplecitizenship.com/documents/IS-01.pdf
A very informative read on the subject matter.
Jerry Carlos