Mayer, Lawrence C.
John Wiley & Sons, 1977
Buku Teks SO
Duke University Press, 1979
Buku Teks SO
Christian Soe
McGraw-Hill, 2004
Buku Teks SO
Barringron, Lowell
Wadsworth and Cengage Learning, 2013
Buku Teks SO
Chilcote, Ronald H.
Routledge, 2000
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