Calvino, I. (1972). Invisible Cities. Harvest Book.
Cita Chicago (17th ed.)Calvino, Italo. Invisible Cities. New York: Harvest Book, 1972.
Cita MLA (9th ed.)Calvino, Italo. Invisible Cities. Harvest Book, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.