Cita APA (7a ed.)

Abraham, W., & Leiss, E. (2012). Covert patterns of modality. Cambridge Scholars Pub.

Cita Chicago Style (17a ed.)

Abraham, Werner, y Elisabeth Leiss. Covert Patterns of Modality. Newcastle upon Tyne: Cambridge Scholars Pub, 2012.

Cita MLA (9a ed.)

Abraham, Werner, y Elisabeth Leiss. Covert Patterns of Modality. Cambridge Scholars Pub, 2012.