Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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