MLA

Tosi, Pier Francesco, and John Ernest Galliard. Observations On the Florid Song; Or Sentiments On the Ancient and Modern Singers: Written In Italian by Pier Francesco Tosi. London: William Reeves, 1926.

APA

Tosi, P. Francesco, & Galliard, J. Ernest. (1926). Observations on the Florid Song; or Sentiments on the Ancient and Modern Singers: Written in Italian by Pier Francesco Tosi. London: William Reeves.

Chicago

Tosi, Pier Francesco Observations On the Florid Song; Or Sentiments On the Ancient and Modern Singers: Written In Italian by Pier Francesco Tosi. Translated by John Ernest Galliard. London: William Reeves, 1926.