ZX Spectrum (English Wikipedia)

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Gilbert 1983a, p. 13. Gilbert, John (June 1983). "Spectrum prices are slashed". Sinclair User (15). London: EMAP.
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South 1984, p. 61. South, Phil (November 1984). "Watford plugs the gap". Your Spectrum (9). Bath: Future plc.
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Tebbutt 1982, p. 118. Tebbutt, David (June 1982). "Benchtest: Sinclair ZX Spectrum". Personal Computer World. 5 (6). London: Incisive Media. Retrieved 18 May 2024.
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Kelion, Leo (23 April 2012). "Sinclair's ZX Spectrum turns 30". BBC News. Archived from the original on 29 June 2019. Retrieved 15 July 2019.

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(in Spanish) Ministerio de Economía y Hacienda (BOE 211 de 3 September 1985), Real Decreto 1558/1985, de 28 de agosto, por el que se aclara el alcance del mínimo específico introducido en la subpartida 84.53.B.II del Arancel de Aduanas, por el Real Decreto 1215/1985 Archived 30 April 2013 at the Wayback Machine. Rango: Real Decreto, Páginas: 27743 – 27744, Referencia: 1985/18847.
(in Spanish) Ministerio de Industria y Energía (BOE 179 de 27 July 1985), Real Decreto 1250/1985, de 19 de junio, por el que se establece la sujeción a especificaciones técnicas de los terminales de pantalla con teclado, periféricos para entrada y representación de información en equipo de proceso de datos Archived 30 April 2013 at the Wayback Machine. Rango: Real Decreto, Páginas: 23840–23841, Referencia: 1985/15611.

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