@book{Aragonés_Palencia_2009, address={Madrid}, title={Gramática de uso del español: teoría y práctica B1 B2: con solucionario}, publisher={Ediciones SM}, author={Aragonés, Luis and Palencia, Ramón}, year={2009} }
@book{Butt_Benjamin_Moreira Rodríguez_2019, address={London}, edition={Sixth edition}, title={A new reference grammar of modern Spanish}, url={http://encore.lib.warwick.ac.uk/iii/encore/record/C__Rb3442466}, publisher={Routledge, Taylor & Francis Group}, author={Butt, John and Benjamin, Carmen and Moreira Rodríguez, Antonia}, year={2019} }
@book{Love_Amiot-Cadey_2009, address={Glasgow}, edition={9th ed}, title={Collins Spanish dictionary =: Collins Universal Español-Inglés, English-Spanish}, publisher={Collins}, author={Love, Catherine E. and Amiot-Cadey, Gaëlle}, year={2009} }
@book{National Textbook Company_1997, address={Lincolnwood, Ill., USA}, title={Repaso: a complete review workbook for grammar, communication, and culture}, url={http://catdir.loc.gov/catdir/enhancements/fy0737/97145967-b.html}, publisher={National Textbook Co}, author={National Textbook Company}, year={1997} }
@book{Pountain_Carlos_Howkins_2011, address={London}, edition={3rd ed}, title={Practicing Spanish grammar}, publisher={Hodder Education}, author={Pountain, Christopher J. and Carlos, Teresa de and Howkins, Angela}, year={2011} }
@book{Rollin, Nicholas_Carvajal, Carol Styles_Horwood, Jane_2009, address={Oxford}, title={The pocket Oxford Spanish dictionary: Spanish-English}, url={http://0-www.oxfordreference.com.pugwash.lib.warwick.ac.uk/view/10.1093/acref/9780191739538.001.0001/acref-9780191739538}, publisher={Oxford University Press}, author={Rollin, Nicholas and Carvajal, Carol Styles and Horwood, Jane}, year={2009} }