APA (7th ed.) Citation

(1998). R.R. Bowker's American library directory 1998-99 (51th ed.). R.R. Bowker.

Chicago Style (17th ed.) Citation

R.R. Bowker's American Library Directory 1998-99. 51th ed. New Jersey: R.R. Bowker, 1998.

MLA (9th ed.) Citation

R.R. Bowker's American Library Directory 1998-99. 51th ed. R.R. Bowker, 1998.