Talisayon, V., & de Pio, S. A. (2014). Is the pinatubo God angry? = Galit ba ang Diyos ng pinatubo?: Simkin Angelo S. de Pio. University of the Philippines National Institute for Science and Mathematics Education Development (UP NISMED).
Cita Chicago (17th ed.)Talisayon, Vivien, i Simkin Angelo de Pio. Is the Pinatubo God Angry? = Galit Ba Ang Diyos Ng Pinatubo?: Simkin Angelo S. De Pio. Quezon City: University of the Philippines National Institute for Science and Mathematics Education Development (UP NISMED), 2014.
Cita MLA (9th ed.)Talisayon, Vivien, i Simkin Angelo de Pio. Is the Pinatubo God Angry? = Galit Ba Ang Diyos Ng Pinatubo?: Simkin Angelo S. De Pio. University of the Philippines National Institute for Science and Mathematics Education Development (UP NISMED), 2014.