Angell, Pamela, author
McGraw-Hill, 2004
Buku Teks
Baird, John W., author
McGraw-Hill, 1983
Buku Teks
Angell, Pamela, author
McGraw-Hill Irwin, 2007
Buku Teks
Quible, Zone K.
Prentice Hall International,inc, 1996
Buku Teks
Quible, Zone K.
Prentice Hall International,inc, 1996
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