Cita APA (7th ed.)

R.R. Bowker Company & Council of National Library and Information Associations (U.S.). (1989). The Bowker annual: Library and book trade almanac. R.R. Bowker.

Cita Chicago (17th ed.)

R.R. Bowker Company i Council of National Library and Information Associations (U.S.). The Bowker Annual: Library and Book Trade Almanac. New York: R.R. Bowker, 1989.

Cita MLA (8th ed.)

R.R. Bowker Company i Council of National Library and Information Associations (U.S.). The Bowker Annual: Library and Book Trade Almanac. R.R. Bowker, 1989.