Foreman, Velma. 1974. Grammar of Yessan-Mayo. (Language Data, Asian-Pacific Series, 4.) SIL.
@book{nicholsdiversity-Foreman1974,
author = {Foreman, Velma},
publisher = {SIL},
series = {Language Data, Asian-Pacific Series},
title = {Grammar of Yessan-Mayo},
volume = {4},
year = {1974}
}