Cooper, H. R. (2015). Negotiating risk and uncertainty: Internal migration and rural villagers in Albay Province. Philippine studies : historical and ethnographic viewpoints.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Cooper, Hedda Ransan. "Negotiating Risk and Uncertainty: Internal Migration and Rural Villagers in Albay Province." Philippine Studies : Historical and Ethnographic Viewpoints 2015.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Cooper, Hedda Ransan. "Negotiating Risk and Uncertainty: Internal Migration and Rural Villagers in Albay Province." Philippine Studies : Historical and Ethnographic Viewpoints, 2015.
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