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}
}