^Supalla, Samuel J. (1992). The Book of Name Signs. p. 22.
^Davis, Jeffrey; Supalla, Samuel (1995). "A Sociolinguistic Description of Sign Language Use in a Navajo Family". In Ceil, Lucas (ed.). Sociolinguistics in Deaf Communities. Gallaudet University Press. pp. 77–106. ISBN978-1-563-68036-6.