Koltay, E. (1967). Irregular serials & annuals: An international directory : a classified guide to current foreign and domestic serials, excepting periodicals issued more frequently than once a year. New York: R. R. Bowker.
Παραπομπή Chicago StyleKoltay, Emery. Irregular Serials & Annuals: An International Directory : A Classified Guide to Current Foreign and Domestic Serials, Excepting Periodicals Issued More Frequently Than Once a Year. New York: R. R. Bowker, 1967.
Παραπομπή MLAKoltay, Emery. Irregular Serials & Annuals: An International Directory : A Classified Guide to Current Foreign and Domestic Serials, Excepting Periodicals Issued More Frequently Than Once a Year. New York: R. R. Bowker, 1967.
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