APA
McCormack J., Watkins S., . (2009). English for academic study: speaking theacher's book. Estados Unidos: University of reading.
Chicago
McCormack Joan, Watkins Sebastian, . 2009. English for academic study: speaking theacher's book. Estados Unidos: University of reading.
Harvard
McCormack J., Watkins S., . (2009). English for academic study: speaking theacher's book. Estados Unidos: University of reading.
MLA
McCormack Joan, Watkins Sebastian, . English for academic study: speaking theacher's book. Estados Unidos: University of reading. 2009.