Chao, Y. R. (1968). Language and symbolic systems. University Press.
Lua i Stíl Chicago (17ú heag.)Chao, Yuen Ren. Language and Symbolic Systems. Cambridge, England: University Press, 1968.
Lua MLA (9ú heag.)Chao, Yuen Ren. Language and Symbolic Systems. University Press, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.