Publishing

Association of American Publishers [some data available by purchase only]
Publisher: Association of American Publishers

Audio Publishers Association
Publisher: Audio Publishers Association

Best Sellers
Publisher: New York Times

Best Selling Books Database
Publisher: USA Today

Book Industry Study Group
Publisher: Book Industry Study Group

Bookwire
Publisher: Bowker

International Digital Publishing Forum [e-book statistics]
Publisher: International Digital Publishing Forum

International Publishers Association
Publisher: International Publishers Association

Magazine Publishers of America
Publisher: Magazine Publishers of America

Newspaper Association of America/Research [some data for members only]
Publisher: Newspaper Association of America

Nielsen BookScan Australia [some data for subscribers only]
Publisher: Nielsen Entertainment

Publishers Weekly
Publisher: Publishers Weekly

Publishing Central
Publisher: PublishingCentral.com