Northrop, F. S. C., author
Macmillan, 1950
Buku Teks
Northrop, F. S. C., author
Macmillan, 1949
Buku Teks
Locke, John, author
Hackett Publishing Company, Inc., 1996
Buku Teks
Locke, John, author
Routledge, 2000
Buku Teks
Locke, John, author
Routledge, 2000
Buku Teks