Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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