Hasselaar, J.M.
s-Gravenhage Bookencentrum 1953
Buku Teks
Bloemhoff, H.W.
Utrecht De Ploeg-Nieuwe Graacht 1945
Buku Teks
Romeo, Luigi, author
Amsterdam John Benjamins 1979
Buku Referensi
Darwin, Charles, author
New York The Modern Library [date of publication not identified],
Buku Teks
Fromm, Erich, author
London and New York : Routledge, 2002
Buku Teks