International Standard Book Number (ISBN) jẹ́ àìlẹ́gbẹ́ oùnka tí wọ́n fi ń dá ìwé mọ̀. Ni ede Yoruba, o tumọ si Nọmba Iwe Itọju Iwe-mimọ International. US ISBN Agency. "Bowker.com – Products". Commerce.bowker.com. Retrieved 2015-06-11.  Gregory, Daniel. "ISBN". PrintRS. Retrieved 2015-06-11.