Keenan, S. (1982). Teletext and Viewdata Services in British Public Libraries.
Citazione stile Chigago Style (17a edizione)Keenan, Stella. Teletext and Viewdata Services in British Public Libraries. 1982.
Citatione MLA (9a ed.)Keenan, Stella. Teletext and Viewdata Services in British Public Libraries. 1982.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.