Lost Crops of Africa : Volume II: Vegetables, National Academies Press, 2006. ProQuest Ebook Central, https://ebookcentral.proquest.com/lib/penncharter/detail.action?docID=3378152 Chapter about Okra
Neumann, Caryn. “Food and Diet in Medieval Africa.” Food and Diet in Medieval History, Facts On File, 2019. History Research Center, online.infobase.com/Auth/Index?aid=171442&itemid=WEHRC&articleId=225615
O’Neal, Michael. “Food and Diet in Ancient Africa.” Food and Diet in Ancient History, Facts On File, 2019. History Research Center, online.infobase.com/Auth/Index?aid=171442&itemid=WEHRC&articleId=226170
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