Robinson, E. A. G., author
At the University Press , 1946
Buku Teks
Artikel Jurnal
Kim, Youngsoo
[publisher not identified], 1995
Buku Teks
Cirovic, Michael M
Reston Publishing Company, 1979
Buku Teks
Ataslina Sri Basuki, author
1993
UI - Laporan Penelitian