SchoenbregsIrene E Focus on Grammar. A Basıc Course For Reference And Practice / Irene E. Schoenberg - 2nd ed. - London : Longman , 1994 . Includes index. ISBN: 0201656817 LCCN: 99053402 Subjects--Topical Terms: English languageEnglish language--Grammar LC Class. No.: PE1128 Dewey Class. No.: 428.2/4