Alfiler, M. C. P. (1999). Philippine administrative system. University of the Philippines Open University.
Citace podle Chicago (17th ed.)Alfiler, Ma. Concepcion P. Philippine Administrative System. Quezon City: University of the Philippines Open University, 1999.
Citace podle MLA (9th ed.)Alfiler, Ma. Concepcion P. Philippine Administrative System. University of the Philippines Open University, 1999.
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