Citazione APA

Richards, J., & Long, M. (1988). Breakthrough: A Course in English Communication Practice. London: Oxford University Press.

Stile di citazione Chicago

Richards, J.C., e M.n Long. Breakthrough: A Course in English Communication Practice. London: Oxford University Press, 1988.

Citazione MLA

Richards, J.C., e M.n Long. Breakthrough: A Course in English Communication Practice. London: Oxford University Press, 1988.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.