APA (7th ed.) Citation
Wetz, B. (2002). Oxford exchange: Student's book 4 = intercambio de Oxford : libro del alumno 4. Oxford university press.
Chicago Style (17th ed.) Citation
Wetz, Ben. Oxford Exchange: Student's Book 4 = Intercambio De Oxford : Libro Del Alumno 4. New York: Oxford university press, 2002.
MLA (9th ed.) Citation
Wetz, Ben. Oxford Exchange: Student's Book 4 = Intercambio De Oxford : Libro Del Alumno 4. Oxford university press, 2002.
Warning: These citations may not always be 100% accurate.