(1994). Open and distance learning in Northern and Eastern Europe: Nordic Council of Ministers (NCM), Helsingborg 1991, Suède ; International Federation for Information Processing (IFIP), Trondheim 1993, Norvège ; European Distance Education Network (EDEN), Tallinn 1994, Estonie. OFES.
Chicago-Zitierstil (17. Ausg.)Open and Distance Learning in Northern and Eastern Europe: Nordic Council of Ministers (NCM), Helsingborg 1991, Suède ; International Federation for Information Processing (IFIP), Trondheim 1993, Norvège ; European Distance Education Network (EDEN), Tallinn 1994, Estonie. Berne: OFES, 1994.
MLA-Zitierstil (9. Ausg.)Open and Distance Learning in Northern and Eastern Europe: Nordic Council of Ministers (NCM), Helsingborg 1991, Suède ; International Federation for Information Processing (IFIP), Trondheim 1993, Norvège ; European Distance Education Network (EDEN), Tallinn 1994, Estonie. OFES, 1994.