Otto Jespersen. (2010). The Philosophy of Grammar. Routledge.
Lua i Stíl Chicago (17ú heag.)Otto Jespersen. The Philosophy of Grammar. New York: Routledge, 2010.
Lua MLA (9ú heag.)Otto Jespersen. The Philosophy of Grammar. Routledge, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.