Graves, E. C. (1956). Ulrich's periodicals directory: A classified guide to a selected list of current periodicals, foreign and domestic (8th ed.). R. R. Bowker.
Chicago-Zitierstil (17. Ausg.)Graves, Eilleen C. Ulrich's Periodicals Directory: A Classified Guide to a Selected List of Current Periodicals, Foreign and Domestic. 8th ed. New York: R. R. Bowker, 1956.
MLA-Zitierstil (9. Ausg.)Graves, Eilleen C. Ulrich's Periodicals Directory: A Classified Guide to a Selected List of Current Periodicals, Foreign and Domestic. 8th ed. R. R. Bowker, 1956.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.