Bloemhoff, H.W.
Utrecht De Ploeg-Nieuwe Graacht 1945
Buku Teks
Romeo, Luigi
Amsterdam John Benjamins 1979
Buku Referensi
Darwin, Charles
New York The Modern Library [date of publication not identified],
Buku Teks
Fromm, Erich
London and New York : Routledge, 2002
Buku Teks
Surabaya : C.V. Sylvia
Majalah, Jurnal, Buletin