The effect of the extract of pasak bumi roots (Eurycoma longifoliaJack.) on liver function - Panjaitan, Ruqiah Ganda Putri; Biology Education, Faculty of Teaching and Education Science, Universitas Tanjungpura, Pontianak (Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia, 2011)