APA (7th ed.) Citation

Upton, G. P. (2013). The Standard Light Operas Their Plots and Their Music. Project Gutenberg.

Chicago Style (17th ed.) Citation

Upton, George P. The Standard Light Operas Their Plots and Their Music. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Upton, George P. The Standard Light Operas Their Plots and Their Music. Project Gutenberg, 2013.

Warning: These citations may not always be 100% accurate.