The Bowker International Serials Database & Yuster, L. C. (1985). Ulrich's international periodicals directory: 1985 : a classified guide to current periodicals, foreign and domestic (24th ed.). R.R. Bowker.
Παραπομπή σε μορφή Chicago (17η εκδ.)The Bowker International Serials Database και Leigh C. Yuster. Ulrich's International Periodicals Directory: 1985 : A Classified Guide to Current Periodicals, Foreign and Domestic. 24th ed. New York: R.R. Bowker, 1985.
Παραπομπή σε μορφή MLA (9th εκδ.)The Bowker International Serials Database και Leigh C. Yuster. Ulrich's International Periodicals Directory: 1985 : A Classified Guide to Current Periodicals, Foreign and Domestic. 24th ed. R.R. Bowker, 1985.
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