(1985). Modelling the impact of small farm mechanization. Philippine Institute for Development Studies.
Lua i Stíl Chicago (17ú heag.)Modelling the Impact of Small Farm Mechanization. [Makati, Metro Manila]: Philippine Institute for Development Studies, 1985.
Lua MLA (9ú heag.)Modelling the Impact of Small Farm Mechanization. Philippine Institute for Development Studies, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.