[publisher not identified], [date of publication not identified]
Naskah
Kaufmann, Walter, editor
Reader's Digest Press, 1977
Buku Teks
Dick Hartoko, author
Kanisius , 1990
Buku Teks
Kanisius , 1985
Buku Teks
Lembaga Penelitian Universitas Muhammadiyah Surakarta, 2002/2003
Majalah, Jurnal, Buletin