L'estetica dei versi, New Era Publications International ApS, Copenaghen<ref>https://www.lronhubbard.it/books/ron-series/poet-lyricist/details.html</ref>
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L'estetica dei versi, New Era Publications International ApS, 2012, Copenaghen<ref>https://www.lronhubbard.it/books/ron-series/poet-lyricist/details.html</ref>