na INLIS000000000005183 20130515151809 ind 0-471-10639-9 0010-051300000005183 ind 513 513 Edward, Julius Trik - Trik Berhitung / editor, Heni, Kusumawati; penerjemah, Bachtiar Bima, Mustriana Cetakan : 6 Bandung Pakar raya 2007 xiii, 142 hlm. ;23.5 cm. Berhitung