Laflin, Shelley Vance
Washington
Office of English Language Programs
2000
Spears, Richard A.
New York
McGraw-Hill Publishing Company
9780071478939
Harlow
Pearson Education
2010
9780582305755
Makkai, Adam
Barron's Educational Series
2004
764127764
București
Teora
2001
9736018458
Boston
Houghton Mifflin Company
1 January 1970
395976200
764119826