Roth, Heinrich, author
Hermann Schroedel Verlag, 1965
Buku Teks
Jung, C.G. (Carl Gustav), 1875-1961, author
Rascher, 1946
Buku Teks
Pestalozzi, Johann Heinrich, author
Zug Klett, 1976
Buku Teks
Wilson, John A. R., author
McGraw-Hill, 1974
Buku Teks
Feldman, Robert S.
McGraw-Hill, 2005
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