Calisch, J.M.
Gebrs E. & M. Cohen, [Date of publication not identified]
Buku Referensi
Kroes, H.W.J.
G.B. Van Goor Zonen, 1928
Buku Referensi
Vries, Jan de
Het Spectrum, 1991
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J.B. Wolters-Groningen, [Date of publication not identified]
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Gallas, K.R.
J.B. Wolters, [Date of publication not identified]
Buku Referensi