Hill, LA
Word power 3000 : vocabulary tests and exercises in American english
Oxford University press, 1982
Buku Teks
Hill, L.A., author
Word power 1500 : vocabulary tests and exercises in American English
Oxford University Press, 1982
Buku Teks
Dixson, Robert J., author
Modern American English; Book 1
Regents Publishing, 1971
Buku Teks
Mastering American English: with recorded exercises for intermediate and advanced students / editor, Grant Taylor
McGraw-Hill, 1956
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Low, Ona, author
Proficiency in english course
Edward Arnold, 1986
Buku Teks
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