Cita APA

Richards, J., & Long, M. (1987). Breakthrough: A Course in English Communication Practice.Workbook. Oxford: Oxford University Press.

Chicago Style Citation

Richards, J.c., i M.n Long. Breakthrough: A Course in English Communication Practice.Workbook. Oxford: Oxford University Press, 1987.

Cita MLA

Richards, J.c., i M.n Long. Breakthrough: A Course in English Communication Practice.Workbook. Oxford: Oxford University Press, 1987.