Campbell, Lyle. 1985. The Pipil Language of El Salvador. (Mouton Grammar Library, 1.) Berlin: Mouton de Gruyter.
@book{sinnemakizeromarking-Campbell1985b,
address = {Berlin},
author = {Campbell, Lyle},
publisher = {Mouton de Gruyter},
series = {Mouton Grammar Library},
title = {The Pipil Language of El Salvador},
volume = {1},
year = {1985}
}