Why you dont quote wikipedia:

[Sternjaeger II]

I dunno if you guys ever created a Wikipedia page, but normally you need to give a reference from a reputable source (e.g. a book on the topic), Wikipedia is just an easier way to gather information available on a topic and make them into an easily accessible page. One thing that you need to be careful about though is whether the topic of the specific page is covered in all its spectrum or some aspects are (deliberately or not) omitted from the page.