Cita APA (7a ed.)

Alfiler, M. C. P. (1999). Philippine administrative system. University of the Philippines Open University.

Cita Chicago Style (17a ed.)

Alfiler, Ma. Concepcion P. Philippine Administrative System. Quezon City: University of the Philippines Open University, 1999.

Cita MLA (9a ed.)

Alfiler, Ma. Concepcion P. Philippine Administrative System. University of the Philippines Open University, 1999.