Cita APA

Porter, D. (2001). Check your vocabulary for english for academic purposes: A workbook for users. Peter Collin Publishing.

Citación estilo Chicago

Porter, David. Check Your Vocabulary for English for Academic Purposes: A Workbook for Users. London: Peter Collin Publishing, 2001.

Cita MLA

Porter, David. Check Your Vocabulary for English for Academic Purposes: A Workbook for Users. London: Peter Collin Publishing, 2001.