Igitabo cyose gisohotse kigira umubare ukiranga,ni umubare ugizwe n’imibare 13, iri mu bice bitanu bitandukanye, buri gice kiba gifite icyo gisobanura. ISBN (International Standard Book Number) ni umubare uranga igitabo; ugaragaza ubwoko bw’igitabo, igihugu cyasohokeyemo, ikigo cyemewe kuyitanga mu gihugu, inzu yasohoye icyo gitabo, ibitabo…