Cita APA (7a ed.)

Hesketh, B., & Yorke, I. (1993). An Introduction to ENG. Focal Press.

Cita Chicago Style (17a ed.)

Hesketh, Bernard, y Ivor Yorke. An Introduction to ENG. Oxford ; Boston: Focal Press, 1993.

Cita MLA (9a ed.)

Hesketh, Bernard, y Ivor Yorke. An Introduction to ENG. Focal Press, 1993.