"

I'm going to include a link to the article here just because it's a nice thing to do.  Rachel Tzvia Back.  This way, if either one of us needs to refer to the article, it's only a click away.  No need to search for the article.
Okay, now that that's done, you can definitely use the same reference more than once!  It's easy to do.  This is covered at Wikipedia:Referencing for beginners but I'll cover the main points here.  The first time you use a reference, it will look something like this:
The Earth is round.Reference info goes here
Then when you want to use it again:
It is mostly covered by water.
You basically just re-use the first part of the reference tag again but put in the ending / character.
And you can definitely say that she is married with three children, if you have a reference.  We often tend to leave out children's names for the sake of the privacy of the child.  The names of the children of very well known celebrities are often included, for example Angelina Jolie or Gwyneth Paltrow because the kids names are already mentioned in so many news stories about them.  But someone who is not quite so famous, like Back, usually has the names left out.
I hope this helps, |(talk) "