Quirk, Randolph A university grammar of english. - 1ra.ed. - Harlow : Longman, 1991. - 484 p. ; 23 cm. ISBN: 0582552079 Subjects--Topical Terms: IDIOMAS OFICIALES Subjects--Index Terms: GRAMATICA INGLESA Index Terms--Genre/Form: LIBRO Universal Decimal Class. No.: 802.0-5