Philippine Council for Agriculture, Forestry and Natural Resources Research and Development (PCARRD), Batalon, J. T., & Joven, J. E. A. (2003). Sweetpotato and cassava. PCARRD-DOST.
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Lua MLA (9ú heag.)Philippine Council for Agriculture, Forestry and Natural Resources Research and Development (PCARRD), et al. Sweetpotato and Cassava. PCARRD-DOST, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.