APA (7th ed.) Zitazioa

Hankes, E. J. (1992). A universal second language. s.n.

Chicago Style (17th ed.) Zitazioa

Hankes, Elmer Joseph. A Universal Second Language. Minneapolis: s.n, 1992.

MLA (9th ed.) Zitazioa

Hankes, Elmer Joseph. A Universal Second Language. s.n, 1992.