Yanuar, V. et al. 2010. Utilization of Crabs Shell (Portunus pelagicus) as Sources of Calcium and Phosphorus in Making of Crackers Product. Jurnal Pengolahan Hasil Perikanan Indonesia. 12, 1 (May 2010). DOI:https://doi.org/10.17844/jphpi.v12i1.895.