Gaya APA

kreager, T, B, W. (2011). Ageing,Gender,Health,and Productivity . : PAU Studi ekonomi - Universitas Indonesia.

Gaya MLA

kreager, Tri, Budi, W.rahardjo,Philip. "Ageing,Gender,Health,and Productivity". : PAU Studi ekonomi - Universitas Indonesia, 2011. Kesehatan Masyarakat.