Stumpf, Samuel Enoch, 1918- 1998, author
McGraw-Hill, 1999
Buku Teks
Stumpf, Samuel Enoch, 1918-1998, author
McGraw-Hill, 1989
Buku Teks
Windelband, Wilhelm, author
Dover, 1956
Buku Teks
Majumdar, R.C., author
Macmillan, 1958
Buku Teks
Lewes, George Henry, author
Cambridge University Press, 2013
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