The guild I belong to makes tote bags this way for the women's shelter. A member taught us this way after seeing a utube video many years ago. So there is no specific pattern. Below is a guide for you but you can change the size rectangles of the bag and lining to make larger or smaller totes. :)

We cut fabric for the outer bag and lining to be 15"w x 30"l. If you are using batting cut it a bit larger than 15 x 30 and quilt the outside of the bag first and square it up and match the lining to the quilted rectangle. So many ways to make handles can be found on free online tote bag patterns. The flap is 3" x 5" and this size can be anything you like.
I did use the link below to learn how to make the zipper pocket. It has step by step photos for zipper pocket. I hope this helps you.

http://www.modabakeshop.com/2013/08/...lly-rolls.html

Very nice tote ! Love the colours & you have done a wonderful job.

Great job! Thanks for the tute as well.

Very pretty! Thank you so much!

Thank you for this. I always knew there was a better way to make a tote and a shorter way and you have shown that way.

Lovely. BrendaK

Thank you for the great tutorial, will be making one like that

Very nice bag.

Great Tote! Another project for my 'to do' list!

Thanks - Nancy

Really nice bag!