(1989). 28th Edition Ulrich's International Periodicals Directory 1989-90: Volume 1 Subjects A-G. R.R.Bowker.
Chicago Style (17th ed.) Citation28th Edition Ulrich's International Periodicals Directory 1989-90: Volume 1 Subjects A-G. New York: R.R.Bowker, 1989.
MLA (9th ed.) Citation28th Edition Ulrich's International Periodicals Directory 1989-90: Volume 1 Subjects A-G. R.R.Bowker, 1989.
Warning: These citations may not always be 100% accurate.


