Haspelmath, Martin. 1993. A Grammar of Lezgian. Berlin–New York: Mouton de Gruyter.
@book{kortmannadverbial-Haspelmath1993,
address = {Berlin–New York},
author = {Haspelmath, Martin},
publisher = {Mouton de Gruyter},
title = {A Grammar of Lezgian},
year = {1993}
}