Mills, C. Wright, author
Oxford University Press, 1968
Buku Teks
Beus, J. G. De
Harper & Brothers, 1953
Buku Teks
Landell, Olaf J. de
F.G.Kroonder , [date of publication not identified]
Buku Teks
Landell, Olaf J. de
De Boekerij, 1976
Buku Teks
Tideman, J.
[publisher not identified], 1934
Buku Klasik