Evera, Stephen Van
[publisher not identified], [date of publication not identified]
Buku Teks
T. David Marson; James D. Meernik, editor
Routledge, 2006
Buku Teks
Pillar, Paul R.
Princeton University Press , 1983
Buku Teks
Conlin Joseph R
The Glencoe Press, 1968
Buku Teks
Thomson, David
Kegan Paul, Trench, Trubner, 1945
Buku Teks