APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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