Carter, R., Hughes, R., & McCarthy, M. Exploring grammar in context. Grammar reference and practice upper-intermediate and advanced.
Citazione stile Chigago Style (17a edizione)Carter, Ronald, Rebecca Hughes, e Michael McCarthy. Exploring Grammar in Context. Grammar Reference and Practice Upper-intermediate and Advanced.
Citatione MLA (8a ed.)Carter, Ronald, et al. Exploring Grammar in Context. Grammar Reference and Practice Upper-intermediate and Advanced.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.