Laughlin, Robert M. "8. The Tzotzil." In Ethnology, edited by Robert Wauchope and Evon Z. Vogt, 152. Vols. 7-8 of Handbook of Middle American Indians. Austin: University of Texas Press, 1969. Accessed August 15, 2021. https://ebookcentral-proquest-com.proxy.library.upenn.edu/lib/upenn-ebooks/reader.action?docID=4826335&ppg=151.