Philippine Islands. Bureau of Civil Service. (1977). Report. 1st-31st. 1900-1930 [microform]. Photoduplication Service. University of the Philippines Library.
Citazione stile Chigago Style (17a edizione)Philippine Islands. Bureau of Civil Service. Report. 1st-31st. 1900-1930 [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
Citatione MLA (9a ed.)Philippine Islands. Bureau of Civil Service. Report. 1st-31st. 1900-1930 [microform]. Photoduplication Service. University of the Philippines Library, 1977.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.