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Pustaka Binaman Pressindo , 1986
Buku Teks
Jackson, Barbara Burn
Richard D. Irwin Inc, 1979
Buku Teks
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Buku Teks
Hall, Ford P.
McGraw-Hill Book Company , 1949
Buku Teks
Hall, Ford P
McGraw-Hill, 1949.
Buku Teks