Toquero, E. S., & French, M. Z. B. (2009). Gaddang of Isabela. National Commission for Culture and the Arts.
Lua i Stíl Chicago (17ú heag.)Toquero, Elena S., agus Ma. Zenaida B. French. Gaddang of Isabela. Manila: National Commission for Culture and the Arts, 2009.
Lua MLA (9ú heag.)Toquero, Elena S., agus Ma. Zenaida B. French. Gaddang of Isabela. National Commission for Culture and the Arts, 2009.
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