By PSSP | 11/16/1989 0 Comment (Quezon City): Ikalabinlimang Pambansang Kumperensiya: โKatiwalian at Pananagutan sa Lipunang Pilipino.โ University of the Philippines, Diliman, Quezon City, 16-18 Nobyembre 1989.ย Pinamahalaan nina Proserpina Tapales at Rogelia Pe-Pua.