Philippine Rice Research Institute & Catudan, B. M. (2013). Philippine rice industry primer series: Region II: Cagayan Valley. Philippine Rice Research Institute.
Čikaški stil citiranja (17. izdanje)Philippine Rice Research Institute i Bethzaida M. Catudan. Philippine Rice Industry Primer Series: Region II: Cagayan Valley. Nueva Ecija: Philippine Rice Research Institute, 2013.
MLA način citiranja (9. izdanje)Philippine Rice Research Institute i Bethzaida M. Catudan. Philippine Rice Industry Primer Series: Region II: Cagayan Valley. Philippine Rice Research Institute, 2013.
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