Usher, R., Bryant, I., & Johnston, R. (1997). Adult education and the postmodern challenge. Routledge.
Čikaški stil citiranja (17. izdanje)Usher, Robin, Ian Bryant, i Rennie Johnston. Adult Education and the Postmodern Challenge. London: Routledge, 1997.
MLA način citiranja (9. izdanje)Usher, Robin, et al. Adult Education and the Postmodern Challenge. Routledge, 1997.
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