De los Angeles, M. S. (1979). Indicators for evaluating the progress and impact of agro-forestry projects. Philippine Center for Economic Development.
Chicago-referens (17:e uppl.)De los Angeles, Marian Segura. Indicators for Evaluating the Progress and Impact of Agro-forestry Projects. Quezon City: Philippine Center for Economic Development, 1979.
MLA-referens (9:e uppl.)De los Angeles, Marian Segura. Indicators for Evaluating the Progress and Impact of Agro-forestry Projects. Philippine Center for Economic Development, 1979.
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