«Audiollibres». Diputació de Barcelona. [Consulta: 19 octubre 2015].
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Trubek, Anne «How the Paperback Novel Changed Popular Literature» (en anglès). Smithsonian.com, 30-03-2010 [Consulta: 19 gener 2017]. «In 1935, Allen Lane, chairman of the eminent British publishing house Bodley Head, spent a weekend in the country with Agatha Christie. Bodley Head, like many other publishers, was faring poorly during the Depression, and Lane was worrying about how to keep the business afloat. While he was in Exeter station waiting for his train back to London, he browsed shops looking for something good to read. He struck out. All he could find were trendy magazines and junky pulp fiction. And then he had a “Eureka!” moment: What if quality books were available at places like train stations and sold for reasonable prices—the price of a pack of cigarettes, say?»
