Battison, Robbin. (1978). Lexical borrowing in American Sign Language. Silver Spring, MD: Linstok Press Inc.
Diane, Brentari. (1998). A prosodic model of sign language phonology. Cambridge, MA: MIT Press.
Morgan, Hope. (2017). The phonology of Kenyan Sign Language (Southwestern dialect). Doctoral dissertation, University of California, San Diego.
Napoli, Donna Jo, Mark Mai, and Nicholas Gaw. (2011). Primary movement in sign languages: A study of six languages. Washington, DC: Gallaudet University Press. https://doi.org/10.2307/j.ctv2rr3d8n.