Cita APA

Littlejohn, A., & Doff, A. (1991). Writing 1. Cambridge: Cambridge University Press.

Citación estilo Chicago

Littlejohn, Andrew, and Adrian Doff. Writing 1. Cambridge: Cambridge University Press, 1991.

Cita MLA

Littlejohn, Andrew, and Adrian Doff. Writing 1. Cambridge: Cambridge University Press, 1991.