Hallenbeck, Wilbur C., author
Harper & Brothers , 1951
Buku Teks
Carter, Harold, author
Longman, 1990
Buku Teks
McGraw-Hill, 2000
Buku Teks
Grava, Sigurd, author
McGraw-Hill , 2003
Buku Teks
Sediono M.P. Tjondronegoro, author
1977
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