Here are links to more directories for authors.
Cover Designers
http://www.onlinedesignerdirectory.com
Book Distributors
http://www.ibpa-online.org/pubresources/distribute.aspx
http://www.bookmarket.com/distributors.htm
http://www.morganprinting.org/Resources1.html
Fulfillment Services
http://www.bookmarket.com/4.htm
http://morganprinting.org/Resources1.html
Social Media Sites Directories
http://www.socialmediawebsites.com
http://traffikd.com/social-media-websites
I am Patricia Fry and these resources are from my book, Promote Your Book, Over 250 Proven, Low-Cost Tips and Techniques for the Enterprising Author. Available at Amazon.com in print, for Kindle and audio. Also available at most other online and downtown bookstores.