APA (7th ed.) Citation

(1973). Ulrich's International Periodicals Directory: A classified guide to current periodicals, foreign and domestic (15th ed. 1973-1974.). Xerox.

Chicago Style (17th ed.) Citation

Ulrich's International Periodicals Directory: A Classified Guide to Current Periodicals, Foreign and Domestic. 15th ed. 1973-1974. New York: Xerox, 1973.

MLA (9th ed.) Citation

Ulrich's International Periodicals Directory: A Classified Guide to Current Periodicals, Foreign and Domestic. 15th ed. 1973-1974. Xerox, 1973.