BB MURPHY, R. English grammar in use : a self-study reference and practice book for intermediate leaners of English :with answers. 5th ed. [s. l.]: University Press, 2019. ISBN 9781108457651.
BB Stannet, Katherine. New Close -up . B2. . Hampshire: National Geographic, 2022 [ISBN 978-357-43401-7]
BB STRUTT, P. English for international tourism : Intermediate CourseBook. [1st ed.]. [s. l.]: Pearson, 2013. ISBN 9781447923831.
BB VINCE, M. Advanced language practice : [with key] : English grammar and vocabulary. 3rd ed. [s. l.]: Macmillan Education, 2009. ISBN 9780230727038.
BB Vince, Michael. First certificate Language Practice. Oxford: Macmillan, 2003.
BC Deltoro, Carmen. Diccionario turístico Inglés - español. Barcelona: Ariel, 2000
BC Duckworth, M.. Going International: English for Tourism. Oxford: Oxford University Press, 1998
BC Eastwood, John. Oxford Practice Grammar. Oxford: Oxford University Press, 1999
BC Jacobs, Miriam.. English for International Tourism / Jacobs, M. y Strutt, Peter. España: Longman, [s.a]
BC [s.n.]. Oxford Advanced Learner’s Dictionary. Oxford: Oxford University Press, 2006
BC Swan, Michael. Practical English usage. 2nd ed., 14 impr. Oxford : Oxford University Press, 2009
BC Thomson y Martinet. A practical english grammar. Oxford: Oxford University Press, 1996