Libro tomado de: https://www.google.es/search?q=libro&source=lnms&tbm=isch&sa=X&ved=0ahUKEwig0bmM16jVAhWGZCYKHTz-C5QQ_AUICigB&biw=1290&bih=674#imgrc=Hm4PMWlcEnFrcM:

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Derrida tomado de: https://www.google.es/search?biw=1267&bih=674&tbm=isch&sa=1&q=derrida+&oq=derrida+&gs_l=psy-ab.3..0i67k1j0l3.49663.50750.0.51138.6.6.0.0.0.0.318.643.0j2j0j1.3.0....0...1.1.64.psy-ab..3.3.640...0i5i30k1j0i30k1j0i8i30k1.JsGe-a4kqLg#imgrc=q4xR4tjaCcgqfM:

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Saussure tomado de: https://www.google.es/search?biw=1267&bih=674&tbm=isch&sa=1&q=saussure&oq=saussure&gs_l=psy-ab.3...690272.691457.0.691640.8.7.0.0.0.0.196.196.0j1.1.0....0...1.1.64.psy-ab..7.1.195...0i67k1.un_k--lhdr0#imgrc=hq4ktC4CwFtNQM:

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Peirce tomado de: https://www.google.es/search?biw=1267&bih=674&tbm=isch&sa=1&q=peirce+frases&oq=peirce+frases&gs_l=psy-ab.3..0.3208.4795.0.4901.7.7.0.0.0.0.153.887.0j6.6.0....0...1.1.64.psy-ab..1.6.884...0i30k1j0i5i30k1j0i8i10i30k1.ULIueIzPCmg#imgrc=dIfUslw-_iADKM:

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Barthes tomado de: https://www.google.es/search?biw=1267&bih=674&tbm=isch&sa=1&q=roland+barthes&oq=roland+&gs_l=psy-ab.3.0.0i67k1j0l3.33821.35606.0.37343.8.8.0.0.0.0.186.989.0j6.6.0....0...1.1.64.psy-ab..2.6.988.RISVl9G4JeY#imgrc=ilaMV-IRxJ8hjM:

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Biografía de Peirce tomada de https://www.biografiasyvidas.com/biografia/p/peirce.htm

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https://www.biografiasyvidas.com/biografia/d/derrida.htm

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https://www.biografiasyvidas.com/biografia/b/barthes.htm