Archibald, W. Peter (William Peter), 1943-
McGraw-Hill Ryerson, 1978
Buku Teks
Ascher, William
Lawrence Erlbaum associates, 2005
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Elster, Jon
Cambridge University Press, 1993
Buku Teks SO
Martha L. Cottam... [et.al.]
Lawrecce Erlbaum Associates, Publihers, 2004
Buku Teks SO
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