Smith, R. M., Aker, G. F., & Kidd, J. Handbook of Adult Educaton.
Tohutoru Kātū Chicago (17th ed.)Smith, Robert M., George F. Aker, me J.R Kidd. Handbook of Adult Educaton.
Tohutoro MLA (9th ed.)Smith, Robert M., et al. Handbook of Adult Educaton.
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