Robertson, John. 1992. The History of Tense/Aspect/Mood/Voice in the Mayan Verbal Complex. Austin: University of Texas Press.
@book{tseltal-R025,
address = {Austin},
author = {Robertson, John},
publisher = {University of Texas Press},
title = {The History of Tense/Aspect/Mood/Voice in the Mayan Verbal Complex},
year = {1992}
}