Campbell, Mary K.
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Buku Teks
Garrett, R. (Reginald)
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Buku Teks
Mathews, Christopher K.
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Buku Teks
Glick, David
Appleton & lange , 1995
Buku Teks
Rastogi, S.C.
Tata McGraw-Hill , 2010
Buku Teks