NC, Ehirim, Osuji EE, Tim-Ashama AC, Essien UA, Eze EU, Praise CN, and Anyanwu UG. “Economic Efficiency of Processed Hibiscus Sabdanriffa (Roselle) Drink in Imo State, Nigeria”. World Scientific Research 9, no. 1 (June 6, 2022): 20–26. Accessed November 28, 2022. http://www.asianonlinejournals.com/index.php/WSR/article/view/3970.