APA (7e ed.) Bronvermelding

Alfiler, M. C. P. (2001). Philippine administrative system. UP Open University.

Chicago (17e ed.) Bronvermelding

Alfiler, Ma. Concepcion P. Philippine Administrative System. Diliman, Quezon City: UP Open University, 2001.

MLA (9e ed.) Bronvermelding

Alfiler, Ma. Concepcion P. Philippine Administrative System. UP Open University, 2001.