D. Afandi, Y. Budiningsih, O. Safitry, A. Purwadianto, D. Novitasari, and I. R. Widjaja, “Effects of an additional small group discussion to cognitive achievement and retention in basic principles of bioethics teaching methods”, Med J Indones, vol. 18, no. 1, pp. 48-52, Feb. 2009.