Muhlmann, Wilhelm.
Dietrich Reimer Verlag, 1961
Buku Teks
Weber, Max, 1864-1920, author
J.C.B. Mohr (Paul Siebeck) Tubingen, 1956
Buku Teks
Jung, C.G. (Carl Gustav), 1875-1961, author
Rascher, 1946
Buku Teks
Mauthner, F.
Stuttgart Cotta 1921
Buku Teks
Franke, O.
Hamburg: L.Friederichsen,1920
Buku Teks