Books
The Graphic Design Business Book
Tad Crawford
Starting Your Career As a Freelance Illustrator or Graphic Designer
Michael Fleishman
Careers by Design: [A Business Guide for Graphic Designers]
Roz Goldfarb
Opportunities in Commercial Art and Graphic Design Careers
Barbara Gordon
Inside The Business Of Illustration
Steven Heller and Marshall Arisman
Breaking into Graphic Design: Tips from the Pros on Finding the Right Position for You
Michael Jefferson
The Graphic Designer’s and Illustrator’s Guide to Marketing & Promotion
Maria Piscopo
How to be a Graphic Designer, Without Losing Your Soul
Adrian Shaughnessy
Selling Graphic Design
Don Sparkman
Designers’ Self-promotion: How Designers and Design Companies Attract Attention to Themselves
Roger Walton (editor)
Artist’s & Graphic Designer’s Market (published annually)
Writer’s Digest Books
The Creative Business Guide to Running a Graphic Design Business
Cameron S. Foote
The Graphic Designer’s Guide to Pricing, Estimating & Budgeting
Theo Stephan Williams
Websites
American Institute of Graphic Arts
Online publications include several on the business and ethics of design. This site also has job postings in the graphic design field.