"All languages change through time, but how they change, what drives these changes, and what kinds of changes we can expect may not be obvious."
Vedrana Mihalicek and Christina Wilson (Eds.) 2011. Language Files: Materials for an Introduction to Language and Linguistics. Columbus: The Ohio State University Press, 522.
Sabio Lantz. "The History of the English Language (detailed)." Triangulations.wordpress.com, 30 September 2014. <https://triangulations.wordpress.com/2014/09/30/the-history-of-the-english-language-a-diagram/>