Gamboa, A. M. S. J. (2002). Development of tax forecasting models: Corporate and individual income taxes. Philippine Institute for Development Studies.
Lua i Stíl Chicago (17ú heag.)Gamboa, Ana Ma Sophia J. Development of Tax Forecasting Models: Corporate and Individual Income Taxes. Makati City: Philippine Institute for Development Studies, 2002.
Lua MLA (9ú heag.)Gamboa, Ana Ma Sophia J. Development of Tax Forecasting Models: Corporate and Individual Income Taxes. Philippine Institute for Development Studies, 2002.
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