Palmer, G. (2004). Writing extra: A resource book of multi-level skills activities. Cambridge University Press.
Citazione stile Chigago Style (17a edizione)Palmer, Graham. Writing Extra: A Resource Book of Multi-level Skills Activities. New York: Cambridge University Press, 2004.
Citatione MLA (9a ed.)Palmer, Graham. Writing Extra: A Resource Book of Multi-level Skills Activities. Cambridge University Press, 2004.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.