Downer, Alan
University of Minnesota Press, 1961
Buku Teks SO
Berkowitz, Gerald M.
Longman, 1994
Buku Teks SO
Gagey, Edmond M.
Columbia University Press, 1948
Buku Teks SO
Cynthia Lucia, Roy Grundmann, Arthur Simon, editors
Wiley Balckwell, 2016
Buku Teks SO
Cynthia Lucia, Roy Grundmann and Art Simon, editors
Wiley Balckwell, 2016
Buku Teks SO