APA (7th ed.) Citation

(1979). Ulrich's international periodicals directory. A classified guide to current periodicals, foreign and domastic (18th ed.). R. R. Bowker.

Chicago Style (17th ed.) Citation

Ulrich's International Periodicals Directory. A Classified Guide to Current Periodicals, Foreign and Domastic. 18th ed. New York: R. R. Bowker, 1979.

MLA (9th ed.) Citation

Ulrich's International Periodicals Directory. A Classified Guide to Current Periodicals, Foreign and Domastic. 18th ed. R. R. Bowker, 1979.