(1997). Ulrich's international periodicals directory 1997: Including irregular serials & annuals (35th edition.). Bowker.
Citação do estilo Chicago (17ª ed.)Ulrich's International Periodicals Directory 1997: Including Irregular Serials & Annuals. 35th edition. New York: Bowker, 1997.
Citação MLA (9ª ed.)Ulrich's International Periodicals Directory 1997: Including Irregular Serials & Annuals. 35th edition. Bowker, 1997.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.