The Bowker International Serials Database. Ulrich's International Periodicals Directory. The Bowker International Serials Database.
Cita Chicago Style (17a ed.)The Bowker International Serials Database. Ulrich's International Periodicals Directory. New York: The Bowker International Serials Database.
Cita MLA (9a ed.)The Bowker International Serials Database. Ulrich's International Periodicals Directory. The Bowker International Serials Database.
Precaución: Estas citas no son 100% exactas.