Bruggencate, K. Ten, author
J.B. Wolters-Groningen, [Date of publication not identified]
Buku Referensi
Kroes, H.W.J., author
G. B. Van Goor Zonen, 1928
Buku Referensi
Verdam, J., author
Martinus Nijhoff, 1932
Buku Referensi
Engels, Friedrich, 1820-1895, author
Fereign Languages Publishing House, 1954
Buku Teks
Lenin, Vladimir I., author
Foreign Languages Publishing House, 1953
Buku Teks