P. R. Purnama, N. W. Nastiti, M. E. Agustin, and M. Affandi, “DIVERSITAS GASTROPODA DI SUNGAI SUKAMADE, TAMAN NASIONAL MERU BETIRI, JAWA TIMUR”, Berkala Penelitian Hayati, vol. 16, no. 2, pp. 143-147, May 2012.