Williams, Harold Herbert, author
Sidgwick & Jackson, 1918
Buku Teks
Wilson, Edmund, 1895-1972, author
Penguin Books, 1993
Buku Teks
Ueda, Makota, author
Stanford University Press, 1976
Buku Teks
edited by Maynard Mack
Prentice-Hall, 1953
Buku Teks
Wilson, Edmund, 1895-1972, author
Charles Scribner's Sons, 1953
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