Atienza, C. L. Inventors, researchers in Davao urged to submit entries to the 2021 invention contest. Manila Bulletin.
Chicago-referens (17:e uppl.)Atienza, Charissa Luci. "Inventors, Researchers in Davao Urged to Submit Entries to the 2021 Invention Contest." Manila Bulletin .
MLA-referens (9:e uppl.)Atienza, Charissa Luci. "Inventors, Researchers in Davao Urged to Submit Entries to the 2021 Invention Contest." Manila Bulletin, .
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