Ok here it works slightly differently to TM.
Let's say you want to reference John 3:16 but do not necessarily want to quote it in full, using bible gateway this is how you do it.
In your text and before you say John 3:16 click the

button. A popup appears
Fill in the URL or paste it - click OK
Copy the link from the other URL
After the link you will be asked to enter text.
In the edit window you will see
[ url=http://www.biblegateway.com/passage/?search=john%203:16&version=50]John 3:16[ /url]
And it renders like this:
John 3:16
Click it and see
One glitch I have noticed, is that if you are typing and decide later to do this in earlier text, it places the
[ url=http://www.biblegateway.com/passage/?search=john%203:16&version=50]John 3:16[ /url]
at the bottom of the text, simply highlight it and move it where you want it.
Blessings