Hollander, Stanley C.
Michigan State University , 1960
Buku Teks
Scott, Peter
Huytchinson University Library , 1970
Buku Teks
Levy, Michael, 1950-
McGraw-Hill Irwin, 2001
Buku Teks
Artikel Jurnal
Levy, Michael, 1950-
[Publisher not identified], 2001
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