Jackson, J.R. de J.
Routlege, 1989
Buku Teks
Crane, R.S., author
University of Chicago Press, 1971
Buku Teks
Krieger, Murray
The Johns Hopkins University Press, 1976
Buku Teks
Luxemburg, Jan van, author
Gramedia , 1989
Buku Teks
Juhl, P.D.
Princeton University Press, 1980
Buku Teks