APA (7th ed.) Zitazioa

River, W. M. (1968). Teaching Foreign - Language Skills. Univ. of Chicago pr..

Chicago Style (17th ed.) Zitazioa

River, Wilga M. Teaching Foreign - Language Skills. Chicago: Univ. of Chicago pr., 1968.

MLA (9th ed.) Zitazioa

River, Wilga M. Teaching Foreign - Language Skills. Univ. of Chicago pr., 1968.