Cita APA (7a ed.)

Morgan, J., & Rinvolucri, M. (1990). Once upon a time: Using stories in the language classroom. Cambridge University Press.

Cita Chicago Style (17a ed.)

Morgan, John, y Mario Rinvolucri. Once upon a Time: Using Stories in the Language Classroom. Cambridge: Cambridge University Press, 1990.

Cita MLA (8a ed.)

Morgan, John, y Mario Rinvolucri. Once upon a Time: Using Stories in the Language Classroom. Cambridge University Press, 1990.