Campbell, D. D. (1977). Adult education as a field of study and practice: Strategies for development. Center for Continuing Education, University of British Columbia.
Chicago-viite (17. p.)Campbell, Duncan D. Adult Education as a Field of Study and Practice: Strategies for Development. Vancouver: Center for Continuing Education, University of British Columbia, 1977.
MLA-viite (8. p.)Campbell, Duncan D. Adult Education as a Field of Study and Practice: Strategies for Development. Center for Continuing Education, University of British Columbia, 1977.
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