Graves, E. C. (1965). Ulrich's international periodicals directory: A classified guide to current periodicals, foreign and domestic (Eleventh edition.). R.R. Bowker Company.
Citazione stile Chigago Style (17a edizione)Graves, Eileen C. Ulrich's International Periodicals Directory: A Classified Guide to Current Periodicals, Foreign and Domestic. Eleventh edition. New York: R.R. Bowker Company, 1965.
Citatione MLA (8a ed.)Graves, Eileen C. Ulrich's International Periodicals Directory: A Classified Guide to Current Periodicals, Foreign and Domestic. Eleventh edition. R.R. Bowker Company, 1965.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.