Lockwood, F. (1994). Materials production in open and distance learning. P. Chapman Pub.
Čikaški stil citiranja (17. izdanje)Lockwood, Fred. Materials Production in Open and Distance Learning. London: P. Chapman Pub, 1994.
MLA način citiranja (9. izdanje)Lockwood, Fred. Materials Production in Open and Distance Learning. P. Chapman Pub, 1994.
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