Jackson, Sheila M.
The English Language Book, 1979
Buku Teks SO
Pearce, Evelyn C. (Evelyn Clare)
Gramedia Pustaka Utama, 1979
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Pearce, Evelyn C. (Evelyn Clare)
Gramedia, 1991
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Miller, Marjorie A.
Macmillan, 1977
Buku Teks SO
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