Cita APA (7th ed.)

CORNISH, T., & HORNCASTLE, B. (1991). Central news: Activity book 4. Oxford Univ. Press.

Cita Chicago (17th ed.)

CORNISH, Tony, i Bill HORNCASTLE. Central News: Activity Book 4. New York: Oxford Univ. Press, 1991.

Cita MLA (9th ed.)

CORNISH, Tony, i Bill HORNCASTLE. Central News: Activity Book 4. Oxford Univ. Press, 1991.