The '''International Standard Book Number''' ('''ISBN''') jẹ́ àìlẹ́gbẹ́ <span class="mw-ref" id="cxcite_ref-1" rel="dc:references">[[#cite_note-1|<span class="mw-reflink-text"><nowiki>[lower-alpha 1]</nowiki></span>]]</span><span class="mw-ref" id="cxcite_ref-1" rel="dc:references"></span><span class="mw-ref" id="cxcite_ref-2" rel="dc:references">[[#cite_note-2|<span class="mw-reflink-text"><nowiki>[lower-alpha 2]</nowiki></span>]]</span><span class="mw-ref" id="cxcite_ref-2" rel="dc:references"></span> oùnka tí wọ́n fi ń dá ìwé mọ̀.
== Àwọn àkíyèsí ==
An ISBN is assigned to each edition and variation (except reprintings) of a book. For example, an e-book, a paperback and a hardcover edition of the same book would each have a different ISBN. The ISBN is 13 digits long if assigned on or after 1 January 2007, and 10 digits long if assigned before 2007. The method of assigning an ISBN is nation-based and varies from country to country, often depending on how large the publishing industry is within a country.