Welmers, WM. E. 1976. A Grammar of Vai. (University of California Publications in Linguistics, 84.) University of California Press.
@book{vai_welmers1976, author = {Welmers, WM. E.}, publisher = {University of California Press}, series = {University of California Publications in Linguistics}, title = {A Grammar of Vai}, volume = {84}, year = {1976} }