Rough Guides
- Summaries of over 20 music guidebook titles.
- http://roughguides.com/website/reference/music/default.aspx

Krause Publications
- Publisher of several record and CD collecting related books, including price guides.
- http://www.krause.com/static/records.htm

Trouser Press
- Official site of Trouser Press magazine (1974-1984) and the Trouser Press Record Guides. Reviews and discographies from five editions of the guidebook.
- http://www.trouserpress.com/

Gramophone Classical Good CD Guide
- Brief description of the guidebook to classical music.
- http://www.gramophone.co.uk/publications_detail.asp?pub=2

RecordResearcher.com
- CD-ROM discography RockRom 10, and book Rock Record 7, with 500,000 records, over a million tracks and musicians. Free sofwared demo download.
- http://www.recordresearcher.com/

Joel Whitburn's Record Research Books
- Information from Billboard magazine's major charts with complete chart data on every recording ever charted. Short descriptions and sample pages from this large line of books.
- http://www.recordresearch.com/

Muze
- Longtime publisher (over 50 years) of directories of recorded music for retail stores; their data is now available for purchase to place on other websites and in-store kiosks.
- http://www.muze.com/

All Music Guide
- Comprehensive guide to recordings in every genre. Cross-indexed source of reviews, essays, and ratings; all available online, on in-store kiosks, and in print form. Uses submissions from readers.
- http://www.allmusic.com/

Osborne Enterprises and Jellyroll Productions
- Producer of price guides (in the "Official Price Guide" series) and reference books for music collectibles. General descriptions of each volume.
- http://www.jerryosborne.com/