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} }