222423 Knapper, C. K., & Cropley, A. J. (1985). Lifelong learning and higher education. Beckenham, Kent : Croom Helm.
Čikaški stil citiranja (17. izdanje)222423 Knapper, Christopher K., i A. J. Cropley. Lifelong Learning and Higher Education. Beckenham, Kent : Croom Helm, 1985.
MLA način citiranja (9. izdanje)222423 Knapper, Christopher K., i A. J. Cropley. Lifelong Learning and Higher Education. Beckenham, Kent : Croom Helm, 1985.
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