Cita APA (7a ed.)

Greenall, S., & Pye, D. (2002). Reading 4. Cambridge University Press.

Cita Chicago Style (17a ed.)

Greenall, Simon, y Diana Pye. Reading 4. Cambridge: Cambridge University Press, 2002.

Cita MLA (9a ed.)

Greenall, Simon, y Diana Pye. Reading 4. Cambridge University Press, 2002.