When copying text from the source article make sure you read over the text and edit it if necessary. (n4g.com)
In order to grab that button, all you need to do is highlight and copy the text in the gray box below the button. (ashandcrafts.com)
Having a long press to switch to the last active application might sound a bit strange, but I use it quite often when copying text. (xda-developers.com)