Livingstone, D. W. (2012) “Probing the Icebergs of Adult Learning: Comparative Findings and Implications of the 1998, 2004 and 2010 Canadian Surveys of Formal and Informal Learning Practices”, Canadian Journal for the Study of Adult Education, 25(1), pp. 47–71. doi: 10.56105/cjsae.v25i1.1124.