Parente, Alfredo. (1944). Myra E. Moss, ,(1987). Hanover, NH: UP of New England, 1987. Ernesto Paolozzi, , in "Rivista di Studi Italiani", University of Toronto, 2002. Janos Keleman, , in "Rivista di Studi Italiani, University of Toronto, 2002. Giuseppe Gembillo, , in "Rivista di Studi Italiani, University of Toronto, 2002. Fabio Fernando Rizi, , University of Toronto Press, 2003. ISBN 978-0-8020-3762-6. Ernesto Paolozzi, , Cassitto, Naples, 1998 (translated by M. Verdicchio (2008) www.ernestopaolozzi.it) Carlo Schirru, Per un’analisi interlinguistica d’epoca: Grazia Deledda e contemporanei, Rivista Italiana di Linguistica e di Dialettologia, Fabrizio Serra editore, Pisa–Roma, Anno XI, 2009, pp. 9–32 Matteo Veronesi, , Bologna, Azeta Fastpress, 2006, ISBN 88-89982-05-5 Roberts, David D. . Berkeley: U of California Press, (1987). Claes G. Ryn, (1997; 1986). R. G. Collingwood, "Croce's Philosophy of History" in , XIX: 263–278 (1921), collected in Collingwood, , ed. William Debbins (University of Texas 1965) at 3–22. Roberts, Jeremy, , Twenty-First Century Books, 2005. ISBN 978-0-8225-2648-3.