APA (7e ed.) Bronvermelding

Gamboa, A. M. S. J. (2002). Development of tax forecasting models: Corporate and individual income taxes. Philippine Institute for Development Studies.

Chicago (17e ed.) Bronvermelding

Gamboa, Ana Ma Sophia J. Development of Tax Forecasting Models: Corporate and Individual Income Taxes. Makati City: Philippine Institute for Development Studies, 2002.

MLA (9e ed.) Bronvermelding

Gamboa, Ana Ma Sophia J. Development of Tax Forecasting Models: Corporate and Individual Income Taxes. Philippine Institute for Development Studies, 2002.