Bradley, J. (2003). The open classroom: Distance learning in and out of schools. Kogan Page.
Čikaški stil citiranja (17. izdanje)Bradley, Jo. The Open Classroom: Distance Learning in and Out of Schools. Kogan Page, 2003.
MLA način citiranja (9. izdanje)Bradley, Jo. The Open Classroom: Distance Learning in and Out of Schools. Kogan Page, 2003.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.