Langen, F. d. (2013). Strategies for sustainable business models for open educational resources. Athabasca University Press.
Cita Chicago Style (17a ed.)Langen, F.H.T de. Strategies for Sustainable Business Models for Open Educational Resources. Athabasca University Press, 2013.
Cita MLA (8a ed.)Langen, F.H.T de. Strategies for Sustainable Business Models for Open Educational Resources. Athabasca University Press, 2013.
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