Hartog, J.P. Den
Dover Publications, INC, 1948
Buku Teks
Boer, H.J. den
Baarn, [date of publication not identified]
Buku Referensi
Mukhin, D.S., author
Sovetskij Pisatel, 1968
Buku Teks
Sovetskij Pisatel, 1964
Buku Teks
Gijsen, Marnix, 1899-, author
Meulenhoff, 1969
Buku Teks