Grammar time, 4 / Maria Carling, Sandy Jervis ; ill. by Peter Standley. - Harlow : Longman, c.2002 (Pearson Education Ltd.). - 144 p. : ill. ; 30 cm.см.. - დაბეჭდილია ესპანეთში. - ISBN 978-0-582-46966-2[MFN: 124728]
Grammar time, 3 : textb. for young students / Maria Carling, Sandy Jervis ; ill. by Peter Standley. - Harlow : Longman, 2002 (Pearson Education Ltd.). - 128 p. : ill. ; 30 cm.см.. - დაბეჭდილია ჩინეთში. - ISBN 058246964-3[MFN: 125088]