@book{Aragones_Palencia_2014a, title={McGraw-Hill Education Beginning Spanish Grammar}, publisher={McGraw-Hill Education - Europe}, author={Aragones, Luis and Palencia, Ramon}, year={2014} }
@book{Aragones_Palencia_2014b, title={McGraw-Hill Education Beginning Spanish Grammar}, publisher={McGraw-Hill Education - Europe}, author={Aragones, Luis and Palencia, Ramon}, year={2014} }
@book{Aragones_Palencia_2014c, title={McGraw-Hill Education Intermediate Spanish Grammar}, publisher={McGraw-Hill Education - Europe}, author={Aragones, Luis and Palencia, Ramon}, year={2014} }
@book{Aragones_Palencia_2014d, title={McGraw-Hill Education Intermediate Spanish Grammar}, publisher={McGraw-Hill Education - Europe}, author={Aragones, Luis and Palencia, Ramon}, year={2014} }
@book{Galimberti Jarman_Russell_Carvajal_Rollin_2008, address={New York}, edition={4th Edition}, title={The Oxford Spanish Dictionary: Spanish-English, English-Spanish}, publisher={Oxford University Press Inc}, author={Galimberti Jarman, Beatriz and Russell, Roy and Carvajal, Carol Styles and Rollin, Nicholas}, year={2008} }
@book{Nissenberg_2016, address={New York}, edition={3rd Edition}, title={Complete Spanish Grammar}, publisher={McGraw-Hill Education}, author={Nissenberg, Gilda}, year={2016} }
@book{Pinilla_San Mateo_2016a, address={Alcobendas (Madrid)}, title={El Expres: Exercises Book Levels A1, A2, B1: Curso Intensivo de Espanol}, publisher={SGEL}, author={Pinilla, Raquel and San Mateo, Alicia}, year={2016} }
@book{Pinilla_San Mateo_2016b, address={Alcobendas (Madrid)}, title={ELExprés: Curso Intensivo De Español}, publisher={SGEL}, author={Pinilla, Raquel and San Mateo, Alicia}, year={2016} }
@book{Richmond_2015, address={New York}, edition={3rd Edition}, title={Spanish Verb Tenses}, publisher={McGraw Hill Education}, author={Richmond, Dorothy Devney}, year={2015} }
@book{Six_2001a, address={London}, title={Upgrade Your Spanish}, publisher={Arnold}, author={Six, Abigail Lee}, year={2001} }
@book{Six_2001b, address={London}, title={Upgrade Your Spanish}, url={https://ebookcentral.proquest.com/lib/rhul/detail.action?docID=581413}, publisher={Arnold}, author={Six, Abigail Lee}, year={2001} }
@book{Collins Spanish Dictionary & Grammar_2018, address={Glasgow}, edition={8th Edition}, publisher={HarperCollins Publishers}, year={2018} }