Lund, R. (1952). Scandinavian adult education: Denmark, Finland, Norway, Sweden (2nd ed.). Det Danske Forlag.
Cita Chicago (17th ed.)Lund, Ragnar. Scandinavian Adult Education: Denmark, Finland, Norway, Sweden. 2nd ed. Copenhagen: Det Danske Forlag, 1952.
Cita MLA (8th ed.)Lund, Ragnar. Scandinavian Adult Education: Denmark, Finland, Norway, Sweden. 2nd ed. Det Danske Forlag, 1952.
Atenció: Aquestes cites poden no estar 100% correctes.