edited by Robert S. Daniel
Hougton Mifflin, 1965
Buku Teks
Daniel, Robert S.
Hoghton Mifflin, 1965
Buku Teks
Abraham, Amit, author
Tata McGraw-Hill, 2011
Buku Teks
Prepared by Frederick L. Coolidge
Pearson Custom, 1997
Buku Teks
Hetherington, Mavis E.
McGraw-Hill , 2006
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