Inspiration has been found in the following sources:
 

The book of Paper Quilling: Author Malinda Johnston

A Guide to Quilling Flowers: Author Helen Walter

Paper Quilling Weekend Crafter: Author Malinda Johnson

The New Paper Quilling: Author Molly Smith

Paper Quilling for the First Time: Author Alli Bartkowski

Iris Folding Compendium Pt .01 and .02: Author Maruscha Gaasenbeck and Tine Bearuveser

Elegant and Easy Iris Paper Folding: Author Marrian Piers

Classic Cards: 60 Projects for the discriminating crafter: Author Marrian Piers

I love getting ideas from many types of magazines as well here are a few of my favorite ones:

Australian paper crafts: Artist Licia Politis

Stamping and paper craft: Artist Win Coleman

Stamp it!

Stampers Sampler

The Rubber Stamper

Card Creations

Rubber Stamp Madness