Name variants: Ngula, Richmond Sadick (preferred) Content type - Any - Article Book Chapter Items per page 5102550100 Sort by Title (ascending)Title (descending)Oldest firstNewest first Displaying 1 - 1 of 1. Article Ngula, Richmond Sadick. Epistemic modal verbs in research articles written by Ghanaian and international scholars: a corpus-based study of three disciplines. Brno studies in English. 2017, vol. 43, iss. 2, pp. 5–27.