: منابع استفاده شده برای ساخت این قسمت از نقطه مشترک

https://www.ted.com/talks/suzana_herculano_houzel_what_is_so_special_about_the_human_brain

- کتاب An Introduction to Language by Victoria Fromkin, Robert Rodman, and Nina Hyams (Page 319-328)

- کتاب How language works by David Crystal (Chapter 27)

- کتاب The study of language by George Yule (Chapter 12)