Jain, MP , author
LexisNexis, 2011
Buku Teks
Clancey, Richad, author
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Buku Teks
Schwartz, Bernard, author
Pitman, 1950
Buku Teks
Lorch, Robert S., author
Wayne State University Press, 1969
Buku Teks
Carroll, Alex, 1947-, author
Pearson Longman, 2007
Buku Teks