Citazione Stile APA (7a Edizione)

(1997). Ulrich's international periodicals directory 1997: Including irregular serials & annuals (35th edition.). Bowker.

Citazione stile Chigago Style (17a edizione)

Ulrich's International Periodicals Directory 1997: Including Irregular Serials & Annuals. 35th edition. New York: Bowker, 1997.

Citatione MLA (9a ed.)

Ulrich's International Periodicals Directory 1997: Including Irregular Serials & Annuals. 35th edition. Bowker, 1997.