Castillo, F. A. (2012). Selected speeches of national scientist: Perla Dizon Santos Ocampo. The Information, Publication, and Public Affairs Office (IPPAO), University of the Philippines Manila.
Chicago-viite (17. p.)Castillo, Fatima A. Selected Speeches of National Scientist: Perla Dizon Santos Ocampo. Manila: The Information, Publication, and Public Affairs Office (IPPAO), University of the Philippines Manila, 2012.
MLA-viite (9. p.)Castillo, Fatima A. Selected Speeches of National Scientist: Perla Dizon Santos Ocampo. The Information, Publication, and Public Affairs Office (IPPAO), University of the Philippines Manila, 2012.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.