edited by John Herman Randali, Justus Buchler
Barnes & Noble, 1950
Buku Teks SO
edited by James L. Jarrett and Sterling M. McMurrin
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Buku Teks SO
Goldman, Alvin I.
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Buku Teks SO
Stumpf, Samuel Enoch, 1918-1998
McGraw-Hill, 2012
Buku Teks
Gyula Klima, Fritz Allhoff, Anand Vaidya
BlackWell Publishing, 2007
Buku Teks SO