APA Edition Citation

R R Bowker company serials department. (1979). Ulrich's international periodicals directory (18th ed.). R R Bowker company.

Chicago Edition Citation

R R Bowker company serials department. Ulrich's International Periodicals Directory. 18th ed. New York: R R Bowker company, 1979.

MLA Edition Citation

R R Bowker company serials department. Ulrich's International Periodicals Directory. 18th ed. R R Bowker company, 1979.