Cita APA (7th ed.)
(1986). Urlich's international periodicals directory: A classified guide to current periodicals, foreign and domestic 1986-1987 (25th ed.). Bowker.
Cita Chicago (17th ed.)
Urlich's International Periodicals Directory: A Classified Guide to Current Periodicals, Foreign and Domestic 1986-1987. 25th ed. New York: Bowker, 1986.
Cita MLA (9th ed.)
Urlich's International Periodicals Directory: A Classified Guide to Current Periodicals, Foreign and Domestic 1986-1987. 25th ed. Bowker, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.