APA (7th ed.) Citation

The Bowker International Serials Database & Salk, J. (1990). Ulrich's international periodicals directory: 1990-91 (29th ed.). R.R. Bowker.

Chicago Style (17th ed.) Citation

The Bowker International Serials Database and Judith Salk. Ulrich's International Periodicals Directory: 1990-91. 29th ed. New York: R.R. Bowker, 1990.

MLA (9th ed.) Citation

The Bowker International Serials Database and Judith Salk. Ulrich's International Periodicals Directory: 1990-91. 29th ed. R.R. Bowker, 1990.