De los Angeles, M. S. (1979). Indicators for evaluating the progress and impact of agro-forestry projects. Philippine Center for Economic Development.
Lua i Stíl Chicago (17ú heag.)De los Angeles, Marian Segura. Indicators for Evaluating the Progress and Impact of Agro-forestry Projects. Quezon City: Philippine Center for Economic Development, 1979.
Lua MLA (9ú heag.)De los Angeles, Marian Segura. Indicators for Evaluating the Progress and Impact of Agro-forestry Projects. Philippine Center for Economic Development, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.