1. Andragogik: Wesen, Möglichkeiten, Grenzen der Erwachsenenbildung;Hanselmann,1951
2. The Learning Society;Husén,1974
3. How Adults Learn;Kidd,1973
4. The Modern Practice of Adult Education: From Pedagogy to Andragogy;Knowles,1980
5. The Identification of Educational Values as a Factor in Adult Education: A Cross-national Approach;Krajnc,1973