Hi. To place the same external link in several articles in different languages is considered cross-wiki linkspam and is not recommended. In fact it can get your IP-address blocked, so be careful when placing external links into articles. -- Tegel (diskussion) 21. dec 2012, 21:11 (CET)

To use it as a source it would be good to refer to the page in the book. So we can verify the source. -- Tegel (diskussion) 21. dec 2012, 22:20 (CET)