List is sorted by rating
Rating (?)
Tweets (*)
pr *
  • Cengage Learning
  • www.cengage.com
  • Reference products for libraries, schools and businesses.
4.5
(si*)
>100
8
4.3
(si*)
>30
8
  • Marquis Who's Who
  • www.marquiswhoswho.com
  • Publishes biography reference sources covering notable people throughout the world.
4.3
(si*)
<5
7
  • ABC-CLIO
  • www.abc-clio.com
  • Publisher of reference books, CD-ROM products, and research publications.
4.3
(si*)
>10
7
  • Facts On File, Inc.
  • www.factsonfile.com
  • Publisher of print and electronic reference products for the school and library market.
4.2
(si*)
-
5
  • R.R. Bowker
  • www.bowker.com
  • Publishes reference products such as Publishers Trade List Annual, Books in Print, and Ulrich's International Periodicals Directory. Serves as official US ISBN agency.
4.2
(si*)
<10
7
4.0
(si*)
>10
6
3.9
(si*)
<5
4
3.8
(si*)
<5
5
  • H.W. Wilson Company
  • www.hwwilson.com
  • Publisher of web, CD-ROM, and print references for librarians and researchers.
3.6
(si*)
-
7
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