APA (7th ed.) Citation

Dowling, R. (2013). The Duke's Sweetheart A Romance. Project Gutenberg.

Chicago Style (17th ed.) Citation

Dowling, Richard. The Duke's Sweetheart A Romance. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Dowling, Richard. The Duke's Sweetheart A Romance. Project Gutenberg, 2013.

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