Lockwood, F. (1995). Open and distance learning today. Routledge.
Citazione stile Chigago Style (17a edizione)Lockwood, Fred. Open and Distance Learning Today. London: Routledge, 1995.
Citatione MLA (9a ed.)Lockwood, Fred. Open and Distance Learning Today. Routledge, 1995.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.