Cita APA (7a ed.)

Jakeman, V., & McDowell, C. (2004). Step up to IELTS: Self-study student's book. Cambridge University Press.

Cita Chicago Style (17a ed.)

Jakeman, Vanessa, y Clare McDowell. Step Up to IELTS: Self-study Student's Book. Cambridge, United Kingdom: Cambridge University Press, 2004.

Cita MLA (9a ed.)

Jakeman, Vanessa, y Clare McDowell. Step Up to IELTS: Self-study Student's Book. Cambridge University Press, 2004.