Caparas, D. (1998). Malacañang announcements and documents (diplomatic agenda of President Estrada). Diplomatic Post.
Chicago-referens (17:e uppl.)Caparas, D.Y. "Malacañang Announcements and Documents (diplomatic Agenda of President Estrada)." Diplomatic Post 1998.
MLA-referens (9:e uppl.)Caparas, D.Y. "Malacañang Announcements and Documents (diplomatic Agenda of President Estrada)." Diplomatic Post, 1998.
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