Day, R.A., author
Erlangga, 1983
Buku Teks
Day, R.A., author
Erlangga, 1990
Buku Teks
Day, R.A., author
[publisher not identified], [date of publication not identified]
Buku Teks
Day, R.A., author
Erlangga, 2002
Buku Teks
Day, R.A., author
Erlangga , 1999
Buku Teks