Lua APA (7ú heag.)
Heathcote, P. (1999). 'A' Level ICT (3rd ed.). Payne- Gallway.
Lua i Stíl Chicago (17ú heag.)
Heathcote, P.M. 'A' Level ICT. 3rd ed. Ipswich, Great Britain: Payne- Gallway, 1999.
Lua MLA (9ú heag.)
Heathcote, P.M. 'A' Level ICT. 3rd ed. Payne- Gallway, 1999.
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