Hardman, Martha J. 1985. Aymara and Quechua: Languages in Contact. In Klein, Harriet E. Manelis and Stark, Louisa R. (eds.), South American Indian Languages: Retrospect and Prospect, 616–643. Austin: University of Texas Press.
@incollection{nicholsdiversity-Hardman1985,
address = {Austin},
author = {Hardman, Martha J.},
booktitle = {South American Indian Languages: Retrospect and Prospect},
editor = {Klein, Harriet E. Manelis and Stark, Louisa R.},
pages = {616–643},
publisher = {University of Texas Press},
title = {Aymara and Quechua: Languages in Contact},
year = {1985}
}