Cita APA (7th ed.)
Erdmann, P. (1990). Discourse and grammar: Focussing and defocussing in English. M. Niemeyer.
Cita Chicago (17th ed.)
Erdmann, Peter. Discourse and Grammar: Focussing and Defocussing in English. Tübingen: M. Niemeyer, 1990.
Cita MLA (9th ed.)
Erdmann, Peter. Discourse and Grammar: Focussing and Defocussing in English. M. Niemeyer, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.