Congressional Research and Training Service. (1991). The Philippine legislature. The Service.
Chicago-referens (17:e uppl.)Congressional Research and Training Service. The Philippine Legislature. [Quezon City]: The Service, 1991.
MLA-referens (9:e uppl.)Congressional Research and Training Service. The Philippine Legislature. The Service, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.