Cita APA (7a ed.)

Sweet, H. (1964). The practical study of languages: A guide for teachers and learners. Oxford University Press.

Cita Chicago Style (17a ed.)

Sweet, Henry. The Practical Study of Languages: A Guide for Teachers and Learners. London: Oxford University Press, 1964.

Cita MLA (9a ed.)

Sweet, Henry. The Practical Study of Languages: A Guide for Teachers and Learners. Oxford University Press, 1964.